Unit 7 Contents

1. For each of these problems, circle the calculations that you should do first. Then find the answer.
1. 2 + 3 7
2. 14 − 3 4
3. 6 2 + 1
4. 3 + 8 ÷ 4
5. 8 − 4 ÷ 2
6. 6 ÷ 3 − 1
7. 4 − 2 + 1
8. 12 ÷ 4 2
9. 3 6 ÷ 2

Are You Smarter Than Your Calculator?

Which calculator is correct?

Some simple calculators do not “know“ the correct order of operations. Check whether your calculator uses the correct order by using it to solve a problem like Jerome's.

2. For each of these problems, first find the answer. Then, if possible, check your answer using a calculator that follows the order of operations.
1. 10 − 2 3
2. 15 − 8 + 6 − 4
3. 4 + 3 2
4. 4 + 9 − 3 2
5. 5 2 + 3
6. 3 + 5 2
7. 5 + 2 3
8. 6 ÷ 3 2
9. 4 4 − 4 ÷ 4
10. 4 + 4 4 − 4
11. 4 4 − 4 − 4
12. 4 4 ÷ 4 − 4
13. 10 + 6 8
14. 10 − 24 ÷ 6
15. 8 7 − 6