题目内容
计算下面各题能简算的要简算
| 6.4÷0.8-1.5×4 | 1.9×2.34+1.9×7.66 | 1.25×64 | 17÷[(1.2+0.5)×5]. |
(1)6.4÷0.8-1.5×4,
=8-6,
=2;
(2)1.9×2.34+1.9×7.66,
=1.9×(2.34+7.66),
=1.9×10,
=19;
(3)1.25×64,
=1.25×8×8,
=10×8,
=80;
(4)17÷[(1.2+0.5)×5],
=17÷[1.7×5],
=17÷1.7÷5,
=10÷5,
=2.
=8-6,
=2;
(2)1.9×2.34+1.9×7.66,
=1.9×(2.34+7.66),
=1.9×10,
=19;
(3)1.25×64,
=1.25×8×8,
=10×8,
=80;
(4)17÷[(1.2+0.5)×5],
=17÷[1.7×5],
=17÷1.7÷5,
=10÷5,
=2.
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