问题
解答题
| 请选择合理的方法计算， ①7.5×
②7
③（26-1.6÷
④43×
|
答案
①7.5×
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
=（7.5+1.5-1）×
| 3 |
| 4 |
=8×
| 3 |
| 4 |
=6；
②7
| 4 |
| 7 |
| 3 |
| 7 |
=7
| 4 |
| 7 |
| 3 |
| 7 |
=10-8.73，
=1.27；
③（26-1.6÷
| 4 |
| 25 |
| 5 |
| 2 |
| 4 |
| 3 |
| 2 |
| 3 |
=（26-1.6×
| 25 |
| 4 |
| 5 |
| 2 |
| 2 |
| 3 |
=（26-25）×
| 3 |
| 2 |
=
| 3 |
| 2 |
④43×
| 136 |
| 137 |
| 59 |
| 137 |
| 68 |
| 137 |
=43×
| 136 |
| 137 |
| 136 |
| 137 |
| 136 |
| 137 |
=（43+59+35）×
| 136 |
| 137 |
=137×
| 136 |
| 137 |
=136．