题目内容
用简便方法计算
18×25%+
×60+42×0.25
5.48+8.73+4.52+1.27
9.7÷1.25÷0.8.
18×25%+
| 1 |
| 4 |
5.48+8.73+4.52+1.27
9.7÷1.25÷0.8.
(1)18×25%+
×60+42×0.25
=18×
+
×60+42×
,
=(18+60+42)×
,
=120×
,
=30;
(2)5.48+8.73+4.52+1.27
=(5.48+4.52)+(8.72+1.27),
=10+10,
=20;
(3)9.7÷1.25÷0.8
=9.7÷(1.25×0.8),
=9.7÷1,
=9.7.
| 1 |
| 4 |
=18×
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
=(18+60+42)×
| 1 |
| 4 |
=120×
| 1 |
| 4 |
=30;
(2)5.48+8.73+4.52+1.27
=(5.48+4.52)+(8.72+1.27),
=10+10,
=20;
(3)9.7÷1.25÷0.8
=9.7÷(1.25×0.8),
=9.7÷1,
=9.7.
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