问题
解答题
| 能简算的要简算 （1）4.9÷
（2）40-15×(
（3）98%×99+（1-1%）×2 （4）
（5）[
|
答案
（1）4.9÷
| 7 |
| 10 |
| 7 |
| 10 |
| 7 |
| 10 |
=4.9×
| 10 |
| 7 |
| 10 |
| 7 |
| 10 |
| 7 |
=（4.9+3.7-1.6）×
| 10 |
| 7 |
=（8.6-1.6）×
| 10 |
| 7 |
=7×
| 10 |
| 7 |
=10；
（2）40-15×(
| 2 |
| 3 |
| 1 |
| 5 |
=40-15×
| 2 |
| 3 |
| 1 |
| 5 |
=40-10-3，
=30-3，
=27；
（3）98%×99+（1-1%）×2，
=98×99%+99%×2，
=（98+2）×99%，
=100×99%，
=99；
（4）
| 8 |
| 9 |
| 3 |
| 4 |
| 7 |
| 16 |
=
| 8 |
| 9 |
| 3 |
| 4 |
| 7 |
| 16 |
| 1 |
| 4 |
=
| 8 |
| 9 |
| 7 |
| 16 |
=
| 8 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 2 |
（5）[
| 15 |
| 4 |
| 1 |
| 3 |
=[
| 15 |
| 4 |
| 1 |
| 3 |
=[
| 15 |
| 4 |
=1.35÷0.125，
=1.08．
