Math: Elementary School: Grades 3, 4 and 5 Quiz - Addition and Subtraction 1 (Questions)

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Addition is when you add two or more numbers together and subtraction is when you take them away. If you are having a party and know that 10 girls and 7 boys will be attending, how many prizes are you going to need? Well, 10 plus 7 is 17. You've got 20 prizes so how many will you have spare? Well, 20 minus 17 is 3. You've just worked out two problems - one addition and one subtraction. Knowing how to solve these problems is very useful in real life.

1. Add 8, 9 and 4.
[ ] 17
[ ] 20
[ ] 21
[ ] 25
2. What is the sum of 14 and 8?
[ ] 18
[ ] 20
[ ] 21
[ ] 22
3. 17 take away 8.
[ ] 9
[ ] 10
[ ] 11
[ ] 12
4. 75 subtract 40.
[ ] 30
[ ] 35
[ ] 40
[ ] 45
5. Which is the missing number: 7 + __ = 20?
[ ] 10
[ ] 12
[ ] 13
[ ] 14
6. What is 78 + 56?
[ ] 134
[ ] 138
[ ] 124
[ ] 128
7. Which is the best method of calculating 45 + 46?
[ ] Double 45 add 1
[ ] Add the tens first and then the units
[ ] Count on from 45
[ ] Add the units first and then the tens
8. Which is a good strategy for adding 9?
[ ] Add 20 and take away 11
[ ] Add 10 and take away 1
[ ] Take away 10 add 1
[ ] Take away 20 add 11
9. Which will not total 100?
[ ] 65 + 35
[ ] 55 + 45
[ ] 75 + 35
[ ] 85 + 15
10. Which number sentence is incorrect?
[ ] 8 + 5 = 13
[ ] 13 - 5 = 8
[ ] 5 + 8 = 13
[ ] 8 - 5 = 13
Math: Elementary School: Grades 3, 4 and 5 Quiz - Addition and Subtraction 1 (Answers)
1. Add 8, 9 and 4.
[ ] 17
[ ] 20
[x] 21
[ ] 25
A good strategy would be 8 + 10 - 1 = 17
17 + 3 = 20 plus 1 left over = 21
2. What is the sum of 14 and 8?
[ ] 18
[ ] 20
[ ] 21
[x] 22
14 + 10 = 24
24 - 2 = 22
3. 17 take away 8.
[x] 9
[ ] 10
[ ] 11
[ ] 12
17 - 10 = 7
7 + 2 = 9
4. 75 subtract 40.
[ ] 30
[x] 35
[ ] 40
[ ] 45
7 - 4 = 3 so 70 - 40 = 30
30 + 5 = 35
5. Which is the missing number: 7 + __ = 20?
[ ] 10
[ ] 12
[x] 13
[ ] 14
One way to work this out is to take 7 away from 20 which will give you the answer 13
6. What is 78 + 56?
[x] 134
[ ] 138
[ ] 124
[ ] 128
It might help to add the tens first and then the units
7. Which is the best method of calculating 45 + 46?
[x] Double 45 add 1
[ ] Add the tens first and then the units
[ ] Count on from 45
[ ] Add the units first and then the tens
45 x 2 = 90
90 + 1 = 91
8. Which is a good strategy for adding 9?
[ ] Add 20 and take away 11
[x] Add 10 and take away 1
[ ] Take away 10 add 1
[ ] Take away 20 add 11
e.g. 35 + 9 so 35 + 10 = 45 then 45 - 1 = 44
9. Which will not total 100?
[ ] 65 + 35
[ ] 55 + 45
[x] 75 + 35
[ ] 85 + 15
75 + 35 = 110
10. Which number sentence is incorrect?
[ ] 8 + 5 = 13
[ ] 13 - 5 = 8
[ ] 5 + 8 = 13
[x] 8 - 5 = 13
The other number sentence that would be correct is 13 - 8 = 5