题目内容
计算下面各题.
| 1.35÷1.5+6.12×0.5 | [1.7÷(6.8-6.12)]×8.6 | 4.8×0.65+0.65×4.2 | 6.8÷[(4.5-2.8)×0.4]. |
(1)1.35÷1.5+6.12×0.5,
=0.9+3.06,
=3.96;
(2)[1.7÷(6.8-6.12)]×8.6,
=[1.7÷0.68]×8.6,
=2.5×8.6,
=21.5;
(3)4.8×0.65+0.65×4.2,
=(4.8+4.2)×0.65,
=9×0.65,
=5.85;
(4)6.8÷[(4.5-2.8)×0.4],
=6.8÷[1.7×0.4],
=6.8÷0.68,
=10.
=0.9+3.06,
=3.96;
(2)[1.7÷(6.8-6.12)]×8.6,
=[1.7÷0.68]×8.6,
=2.5×8.6,
=21.5;
(3)4.8×0.65+0.65×4.2,
=(4.8+4.2)×0.65,
=9×0.65,
=5.85;
(4)6.8÷[(4.5-2.8)×0.4],
=6.8÷[1.7×0.4],
=6.8÷0.68,
=10.
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