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

5 per page

10 per page

20 per page

Symbols

x2
x3
₵
$
⊥
//
∠
°
π
%
:
\[ \]
STUDENT
Navigations
Contact Us
Members
Links