1 P4.MS.TL.18082233
Level 1
Find the following values without a calculator.

Round off the following numbers to the nearest 10.
  1. 45
  2. 125
  3. 213
  4. 5283
2 m
W Place values W Round off
2 P4.MS.TL.18082234
Level 1
Find the following values without a calculator.

Round off the following numbers to the nearest 100.
  1. 312
  2. 619
  3. 4821
  4. 7126
2 m
W Place values W Round off
3 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
4 P4.WN.JM.17102131
Level 1
Round off 99546 to the nearest ten.
1 m
W Place values W Round off
5 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
6 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
7 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
8 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
9 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
10 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
11 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
12 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
13 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
14 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
15 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
16 P4.AP.JM.17100195
Level 3
A rectangular floor, 18 m by 9.5 m, is laid with rubber tiles at a cost of $29 per square metre.
  1. Find the cost of tiling the floor.
  2. Round off the answer in (a) to the nearest thousand dollars.
3 m
Rectangle Tiling W Round off Money
17 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
18 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
19 P4.WN.JM.17102203
Level 2
I am a whole number. The sum of all my digits is 20. If you round me off to the nearest ten, you will get 970. If you round me off to the nearest hundred, you will get 1000. Who am I?
4 m
W Place values W Addition & subtraction W Round off
20 P4.WN.JM.17102210
Level 2
I am a 3-digit number. I am divisible by 7. If you round me off to the nearest hundred, you will get 500. If you round me off to the nearest ten, you will also get 500. Who am I?
4 m
W Place values W Multiplication & division W Round off

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