Year 5 Maths Challenge

Hi Year 5,

this half term’s  maths challenges link to our rivers topic.

Bronze

The River Nile is 4132 miles long – round to the nearest 1000, 100 or 10.

Where are the coldest waters in the world? Find the location of the coldest waters around the world and identify the average temperature. Put the waters in order.

Silver

Calculate the temperature of the Pacific Ocean and calculate the temperature differences of this throughout the year e.g. the maximum and minimum temperatures.

Locate the 3 deepest oceans and calculate the combined depth of these in metres and km etc.

Gold

The Atlantic Ocean covers approximately 106,400,000 square kilometres which is 20% of the Earth’s surface, how many square kilometres is the Earth’s surface?

Good luck!

50 thoughts on “Year 5 Maths Challenge

  1. BRONZE__________________________________________________________4132 rounded 10 =4130
    4132 rounded 100 =4100
    4132 rounded 1000 =4000

    GOLD
    106,400,000 is 20% so if the twenty acts like a two towards hundreds then 5 x 2 is 10 (Now a hundred)
    106,400,000 x 5 = 532,000,000.

  2. Gold challenge:
    The Atlantic Ocean covers approximately 106,400,000 square kilometres which is 20% of the Earth’s surface. So I multilplied the number 106,400,000 x 5 (because 20 is only a small proportion of a hundred/percenatge: my answer was 532000000 km square. To check the answer I divided 5 by 532000000 and the answer was 106,400,000.

  3. Bronze challenge:
    4132 rounded to the nearest 10 is 4130
    4132 rounded to the nearest 100 is 4100
    4132 rounded to the nearest 1000 is 4000

    Silver challenge:
    According to my search I found out that surface water temperature
    in the Pacific Ocean can vary from -1.4°C (29.5 °F), the freezing point of sea water, in the pole wards areas to about 30 °C (86 °F) near the equator.To find out the difference between -1.4°C and 30 °C we have to subtract therefore the answer is 29.6°C.

    The 3 deepest oceans are:
    Pacific Ocean (10,924 meters)
    Atlantic Ocean (9,219 meters)
    Indian Ocean (7,455 meters)
    The combined depth of the three oceans is 27,598m.
    To find out the answer in kilometers I converted the depth in meteres to kilometers.The answer is 27.598km.

  4. BRONZE
    4132
    nearest 10: 4130
    nearest 100:4100
    nearest1000:4000
    The Upper Neretva has water of Class I purity and is almost certainly the coldest river water in the world, often as low as 7–8 degrees Celsius in the summer months.

  5. Bronze
    4132 rounded to the nearest 1000 is 4000.
    4132 rounded to the nearest 100 is 4100.
    4132 rounded ro the nearest 10 is 4130.

    Gold
    Answer:532,000,000

  6. Bronze
    Nearest 10 is 4130
    Nearest 100 is 4100
    Nearest 1000 is 4000

    Coldest water on earth:
    Ifrane, Morocco- -11.0F
    Vostok Station -128.6F

    Silver
    Temperature in the Pacific Ocean can vary from -1.4C (freezing point) to about 30C near the equator. The difference of this is 30 – -1.4= 28.6
    Depth of Three Ocean:
    Pacific Ocean- 10,911meters = 10.911km
    Atlantic Ocean- 3,339meters = 3.339km
    Indian Ocean: 8,047 meters = 8.047km
    Combined Depth: 22,297meters= 22.297km

    Gold
    106,400,000 is 20%, so 100% would be 106,400,000 x 5= 532, 000,000

  7. Bronze

    4132 nearest to 10 is 4130
    4132 nearest to 100 is 4100
    4132 nearest to 1000 is 4000

    Silver-San Diego Bay

    January-59
    February-60
    March-62
    April-64
    May-67
    June-70
    July-71
    August-72
    September-70
    October-68
    November-65
    December-60
    72-59=13

    The 3 deepest oceans are:
    Pacific Ocean-10,924m, 10.924km
    Atlantic Ocean-9,219m, 9.219km
    Indian Ocean-7,455m, 7.455km

    Gold
    106,400,000km x 5 = 532,000,000km

  8. Gold challenge
    So if the Atlantic Ocean cover approximately 106,400,000 square kilometres which is 20% goes into 100 then 5 times so 20% of the earths surface that means that the square kilometre is 532,000,000km this is the answer I’ve got is 106,400,000x 5=532,000,000km
    Bronze challenge
    The nearest 10 is = 4130m
    The nearest 100 is= 4100m
    The nearest 1000 is = 4000m
    Silver challenge
    Indian Ocean 7455 and 24460

  9. Bronze
    1. 4132 to the nearest 10 would be 4130 miles
    2.4132 to the nearest 100 would be 4100 miles
    3. 4132 to the nearest 1000 would be 4000 miles

  10. Gold
    The Atlantic Ocean covers 106400000 square kilometres that is 20% of the earths surface how muck in kilometres is the whole of the earths surface?
    10640000 times by 5 is 532000000 kilometres. That is the earths surface in kilometres.

  11. Gold:

    In order to calculate the earths surface we have to times 106,400,000 by 5 as it is 20% of the earths surface.20% is equivalent to 1/5 therefore we have to times it by 5.106,400,000 multiplied by five is 532,000,000 therefore the earth is approximately 532,000,000 square kilometres.

  12. coldest water on earth is considered to be in the depth of ocean and that is Mariana trench.This is because of extreme water pressure .Rest of the ocean stays relatively warm because of earth temperatures.Lowest temp in the trench is _10 cdegree celsius.
    4132 round 10 4130
    4132 round 100 4100
    4132 round 1000 4000

  13. Gold

    My answer for gold was 532,000,000 square kilometres.By saying this I mean that I think that the Earth`s surface is approximately 532,000,000. I worked this out by doing a sum which was 20×5. I did this because it is stated that the atlantic ocean covers approximately 106,400,000 square kilometres which is 20% of the earths suface. I knew that 20×5 is 100 so this would make 100%. After this sum, I had to work out 106,400,000×5. Once I had worked this out my answer was 532,000,000. This is how I got my answer as 532,000,000 kilometres squared.

  14. BRONZE
    4132
    round to nearest 10 = 4130
    round to nearest 100 = 4100
    round to nearest 1000 = 4000

    The Upper Neretva has water of Class I purity and is almost certainly the coldest river water in the world, often as low as 7–8 degrees Celsius in the summer months.

  15. Silver
    Canada-Sydney
    January:34 Fahrenheit
    February:32 Fahrenheit
    March:32 Fahrenheit
    April:34 Fahrenheit
    May:39 Fahrenheit
    June:46 Fahrenheit
    July:57 Fahrenheit
    August:66 Fahrenheit
    September:63 Fahrenheit
    October:55 Fahrenheit
    November:46 Fahrenheit
    December:39 Fahrenheit

    The maximum:66 Fahrenheit
    The minimum:32 Fahrenheit

    The three deepest oceans are:
    Pacific Ocean (35,837 Fahrenheit )(10,924 meters)
    Atlantic Ocean (30,246 Fahrenheit)(9,219 meters)
    Indian Ocean (24,460 Fahrenheit) (7,455 meters)

  16. Bronze
    4132 rounded to the nearest 10 equals 4130 miles
    4132 rounded to the nearest 100 equals 4100 miles
    4132 rounded to the nearest 1000 equals 4000 miles
    The coldest river in the world is called The Upper Nevetra.

  17. Silver
    Los Angeles
    JAN-58
    FEB-58
    MAR-60
    APR-60
    MAY-61
    JUN-63
    JUL-66
    AUG-68
    SEP-67
    OCT-66
    NOV-64
    DEC-60

    Maximum temperature is 68 degree’s
    Minimum temperature is 58 degree’s
    The difference in temperature is 10 degree’s

    The 3 deepest oceans are
    Pacific @ 10.924km or 109424m
    Atlantic @ 9.219km or 9219m
    Indian @ 7.455km or 7455m

    Giving a total depth of 27.598km or 27598m

  18. Bronze
    4132 rouding to the nearest 10= 4130
    4132 rouding to the nearest 100= 412300
    4132 rouding to the nearest 1000 = 412300

    The coldest river in the world is called nervosa. The temperture is -81.0

  19. Bronze
    4132 rouding to the nearest 10= 4130
    4132 rouding to the nearest 100= 412300
    4132 rouding to the nearest 1000 = 412300

    The coldest river in the world is called nerveta

  20. Gold challenge
    I got the answer 532000000 because I know 20 goes out to into 100 five times. So I multiplied 106400000 5 times which had got me 532000000.

  21. Bronze
    4132 rounded to the nearest thousand is 4000
    4132 rounded to the nearest 100 equals 4100
    4132 rounded to the nearest 10 equals is 4130
    Gold
    Answer : 212,800,000

  22. GOLD

    Earth’s surface is y

    20/100 X y = 106,400,000
    y = 100/20 X 106,400,000
    y = 5 X 106,400,000
    y = 532,000,000

    Silver
    Pacific Ocean Temperature In San Francisco in °F
    J F M A M J J A S O N D
    52 53 54 55 56 57 60 61 60 58 57 53
    Difference = maximum – minimum
    Difference = 61-52 = 9 °F

    Depth of three oceans
    Pacific Ocean10,924 meters = 10.924km
    Atlantic Ocean 9,219 meters = 9.219km
    Indian Ocean 7,455 meters = 7.455km
    Total: 27598m = 27.598km

    Bronze
    4132 to nearest 10=4130
    4132 to nearest 100=4100
    4132 to nearest 1000=4000

  23. Bronze
    4132 rounded to the nearest thousand is 4000
    4132 rounded to the nearest 100 equals 4100
    4132 rounded to the nearest 10 equals is 4130
    Silver
    Average temperature: 63.75 Fahrenheit
    January and February:14 Fahrenheit
    March:13 Fahrenheit
    April:14 Fahrenheit
    May:15 Fahrenheit
    June:12 Fahrenheit
    July:12 Fahrenheit
    August:14 Fahrenheit
    September:15 Fahrenheit
    October:16 Fahrenheit
    November:13 Fahrenheit
    December:14 Fahrenheit
    Gold
    Answer : 212,800,000

  24. Bronze
    4132 rounded to the nearest thousand is 4000
    4132 rounded to the nearest 100 equals 4100
    4132 rounded to the nearest 10 equals is 4130
    Silver
    Average temperature: 63.75 Fahrenheit
    January and February:14 Fahrenheit
    March:13 Fahrenheit
    April:14 Fahrenheit
    May:15 Fahrenheit
    June:12 Fahrenheit
    July:12 Fahrenheit
    August:14 Fahrenheit
    September:15 Fahrenheit
    October:16 Fahrenheit
    November:13 Fahrenheit
    December:14 Fahrenheit
    Gold
    Answer : 212,800,000

  25. BRONZE
    ___________________________________________________________________
    4132 ROUNDED TO THE NEAREST 10 = 4130
    4132 ROUNDED TO THE NEAREST 100 = 4100
    4132 ROUNDED TO THE NEAREST 1000 = 4000

  26. Bronze
    4132 rounded to the nearest thousand is 4000
    4132 rounded to the nearest 100 equals 4100
    4132 rounded to the nearest 10 equals is 4130

    Silver

    Average temperature: 63.75 Fahrenheit
    January and February:14 Fahrenheit
    March:13 Fahrenheit
    April:14 Fahrenheit
    May:15 Fahrenheit
    June:12 Fahrenheit
    July:12 Fahrenheit
    August:14 Fahrenheit
    September:15 Fahrenheit
    October:16 Fahrenheit
    November:13 Fahrenheit
    December:14 Fahrenheit

    Gold
    Answer : 212,800,000

  27. BRONZE
    1. 4132 to the nearest 10 would be 4130 miles
    2. 4132 to the nearest 100 would be 4100 miles
    3. 4132 to the nearest 1000 would be 4000 miles

    silver
    The temperature of the pacific ocean is 1.4 degrees celcius /29.5 degrees fahrenheit

  28. GOLD

    I knew that 2 x 5 = 10 so from that I figured out that 20% x 5 = 100%. Now that I had worked out what sum I needed to do, I took my 20% ( 106,400,000 square kilometres ) and multiplied it by 5 which gave me my 100% or 532,000,000 square kilometres.

  29. Bronze
    The nearest ten is 4130 miles as the unit less than 4.

    The nearest hundred is 4100 miles as the ten is less than 4.

    The nearest thousand is 4000 miles as the hundred is less than 4.

    Gold
    The square kilometre of the earth is 42000000km.

  30. Gold challenge
    Before I got this answer I had to work this out a few times until I got 420,000,00. I Got these answers as I know 20% goes into 100% 5 times so I multiplied 106,400,000 by 5 so I got the answer 42000000km.😄

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