脱式计算，能简算的要简算．①1315÷(14+25)②3÷34?34÷3③125×(56+34)+15④98%×981+0.02×981．
脱式计算，能简算的要简算．①1315÷(14+25)②3÷34?34÷3③125×(56+34)+15④98%×981+0.02×981．...
脱式计算，能简算的要简算．①1315÷(14+25)②3÷34?34÷3③125×(56+34)+15④98%×981+0.02×981．
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①
| 13 |
| 15 |
| 1 |
| 4 |
| 2 |
| 5 |
=
| 13 |
| 15 |
| 13 |
| 20 |
=
| 4 |
| 3 |
②3÷
| 3 |
| 4 |
| 3 |
| 4 |
=4-
| 1 |
| 4 |
=3
| 3 |
| 4 |
③
| 12 |
| 5 |
| 5 |
| 6 |
| 3 |
| 4 |
| 1 |
| 5 |
=
| 12 |
| 5 |
| 5 |
| 6 |
| 12 |
| 5 |
| 3 |
| 4 |
| 1 |
| 5 |
=2+
| 9 |
| 5 |
| 1 |
| 5 |
=2+（
| 9 |
| 5 |
| 1 |
| 5 |
=2+2，
=4；
④98%×981+0.02×981，
=（98%+0.02）×981，
=1×981，
=981．
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