More addition & subtraction

Adding & subtracting efficiently

Name: ______________________________Date: ______________Score: ______ / 20

1.
Find the sum of 318 and 425.
2.
Find the difference between 425 and 318.
3.
A builder has 485 bricks. He uses 278 bricks. How many bricks does he have left?
4.
There are 138 adults and 85 children at a concert. How many people are at the concert?
5.
Work out 367 − 185.
6.
Find the sum of 456 and 789.
7.
What is the total of 763 and 869?
8.
What is 678 more than 456?
9.
Subtract 456 from 789.
10.
Find the difference between 678 and 923.
11.
What is 906 minus 858?
12.
457 + ? = 713. What is the missing number?
13.
? + 605 = 1000. What is the missing number?
14.
Subtract 255 from 600.
15.
Maria baked 210 biscuits on Monday. On Tuesday she baked 35 more than on Monday. How many did she bake on Tuesday?
16.
Maria baked 210 biscuits on Monday and 245 on Tuesday. How many did she bake altogether?
17.
When you add and get 7 ones + 5 ones = 12 ones, what do you do?
1. AWrite 12 in the ones column
2. BWrite 2 and carry 1 ten
3. CWrite 1 and carry 2
4. DWrite 21
18.
In 367 − 185 you cannot take 8 tens from 6 tens. What do you do?
1. AGive up
2. BRegroup a hundred into 10 tens
3. CAdd instead
4. DSwap the numbers
19.
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
20.
456 + 789 = 1245.
True False

Answer key

More addition & subtraction — Adding & subtracting efficiently