21 P4.MS.TL.18082235
Level 1
Find the following values without a calculator.

Round off the following numbers to the nearest 1000.
  1. 6592
  2. 2386
  3. 5834
  4. 8136
2 m
W Place values W Round off
22 P4.WN.JM.17102123
Level 1
23495 is expressed as a sum of the values of its digits. Fill in the blanks with the correct numbers.

23495 = 2 x 10000 + 3 x (a) ___ + 4 x (b) ___ + 9 x (c) ___ + (d) ___
1 m
W Place values W 4 operations
23 P4.WN.JM.17102131
Level 1
Round off 99546 to the nearest ten.
1 m
W Place values W Round off
24 P4.WN.JM.17102178
Level 2
The sum of 39 tens, 15 hundreds, 20 thousands and 45 ones is ___.
2 m
W Place values W Addition & subtraction
25 P4.WN.JM.17102251
Level 2
With the digits 3, 4 and 5, form the largest three-digit number which when rounded off to the nearest hundred is 400?
2 m
W Place values W Round off Min-max
26 P4.WN.JM.17102179
Level 2
One hundred and seven thousand, six hundred and forty-two is 96 937 more than ____.
2 m
W Place values Numbers in words More than or less than
27 P4.WN.JM.17102180
Level 2
Multiply 859 and 7. What is the number in the thousands place in the product?
2 m
W Place values W Multiplication & division
28 P4.WN.JM.17102207
Level 1
Round off 88 to the nearest ten. Then estimate 88 x 9.
2 m
W Place values W Multiplication & division W Round off Estimation
29 P4.WN.JM.17102208
Level 1
Round off 415 to the nearest hundred. Then estimate 415 x 7.
2 m
W Place values W Multiplication & division W Round off Estimation
30 P4.WN.JM.17102209
Level 1
Give an estimate for 78 x 574 by first rounding the values to the nearest ten.
2 m
W Place values W Multiplication & division W Round off Estimation
31 P4.WN.JM.17102211
Level 1
Estimate the product of 35972 and 63 by first rounding off the bigger number to the nearest thousand and the smaller number to the nearest ten.
2 m
W Place values W Multiplication & division W Round off Estimation
32 P4.WN.JM.17102150
Level 1
The height of a tree is about 100 m when rounded off to the nearest ten. What is the lowest possible height of the tree?
2 m
W Place values W Round off Min-max
33 P4.WN.JM.17102151
Level 1
The height of Mount Everest is about 9000 m when rounded off to the nearest thousand. What is the highest possible height of Mount Everest?
2 m
W Place values W Round off Min-max
34 P4.WN.JM.17102147
Level 1
Sock Hoon had about $280 after rounding off the money to the nearest ten. She spent $79. What was the smallest possible amount of money she had left?
2 m
W Place values W Addition & subtraction W Round off Min-max Money
35 P4.WN.JM.17102149
Level 1
The amount of money Tom has is about $800 when rounded off to the nearest $100. What is the greatest possible amount of money that Tom has?
2 m
W Place values W Addition & subtraction W Round off Min-max Money
36 P4.WN.JM.17102253
Level 2
A number when rounded off to the nearest ten gives a value of 24350.
  1. What is the smallest possible number?
  2. What is the largest possible number?
2 m
W Place values W Round off Min-max
37 P4.WN.JM.17102252
Level 2
The number of chairs in the hall is 1500 when rounded off to the nearest hundred.
  1. What is the greatest possible number of chairs in the hall?
  2. What is the smallest possible number of chairs in the hall?
2 m
W Place values W Round off Min-max
38 P4.WN.JM.17102320
Level 3
Tom is thinking of a Y-digit number.
  1. It has '1' as one of the digits.
  2. The digit '2' is in its hundreds place.
  3. The value of the digit '5' is 50.
  4. The digit in the thousands place is twice the digit in the hundreds place.
  5. The digit in the thousands place is 2 times the digit in the ones place.

What number is he thinking of?
3 m
W Place values Times as many
39 P4.WN.JM.17102204
Level 2
Estimate the value of each of the following expressions. Round off the numbers to the nearest hundred before adding or subtracting.

885 + 712 + 499
3 m
W Place values W Addition & subtraction W Round off Estimation
40 P4.WN.JM.17102205
Level 2
Estimate the value of each of the following expressions. Round off the numbers to the nearest hundred before adding or subtracting.

909 + 214 - 687
3 m
W Place values W Addition & subtraction W Round off Estimation

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