# 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
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