1.Match each of the following.
| ³√343 |
√49×49 |
| 49×√49 |
(√7×7×7)² |
| 7² |
(-7)×(-7)×(-7) |
| (-7)³ |
³√7×7×7 |
³√343=³√7×7×7
49×√49=√49×49
7²=(√7×7×7)²
(-7)³=(-7)×(-7)×(-7)
有颜色的是我的答案。
2.List the perfect squares between 20 and 40.
25 and 36
有颜色的是我的答案。
3.Estimate √72 without using a calculator.
√72=8.485
=8.49
我做的算式对不对。
4.Determine whether each of the following number is a perfect cube or not.
| 215 |
not perfect cube |
| 729 |
perfect cube |
not perfect cube和perfect cube可以帮我检查对不对吗？
