Addition and subtraction

Adding & subtracting efficiently

Name: ______________________________Date: ______________Score: ______ / 20

1.
Find the sum of 318 and 425.
2.
There are 138 adults and 85 children at a concert. How many people are at the concert?
3.
Find the sum of 456 and 789.
4.
Subtract 456 from 789.
5.
What is 906 minus 858?
6.
Subtract 255 from 600.
7.
Maria baked 210 biscuits on Monday and 245 on Tuesday. How many did she bake altogether?
8.
What is a good first step before doing a calculation?
1. AEstimate the size of the answer
2. BRub out the numbers
3. CWrite the answer down first
4. DCount on your fingers to 1000
9.
To subtract in columns you line up the ones, tens and hundreds under each other.
True False
10.
Estimate 456 + 789 by rounding each number to the nearest 100.
1. A400 + 700 = 1100
2. B500 + 800 = 1300
3. C400 + 800 = 1200
4. D500 + 700 = 1200
11.
Work out each total, then put them in order from smallest to largest.
Write the order (in order) in the boxes:
- ?485 − 278
- ?138 + 85
- ?318 + 425
- ?456 + 789
12.
Naomi makes two 3-digit numbers using the digits 1, 2, 3, 4, 5 and 6 once each. What is the smallest total she can make?
13.
What is the difference between 1000 and the smallest 3-digit number that does not use the digit 0?
14.
Work out 796 − 160.
15.
Find the difference between 465 and 992.
16.
What is 3000 − 35?
17.
Find the difference between 475 and 475.
18.
Find the difference between 920 and 944.
19.
? + 535 = 5000. What is the missing number?
20.
Find the difference between 500 and 397.

Answer key

Addition and subtraction — Adding & subtracting efficiently