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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