题目内容
简便计算.
0.6×47+52×
|
5.72-1.84-1.16 | 7
|
分析:(1)(3)根据数字特点,运用乘法分配律简算;
(3)运用减法的性质简算.
(3)运用减法的性质简算.
解答:解:(1)0.6×47+52×
+60%,
=0.6×47+52×0.6+0.6,
=0.6×(47+52+1),
=0.6×100,
=60;
(2)5.72-1.84-1.16,
=5.72-(1.84+1.16),
=5.72-3,
=2.72;
(3)7
×6
+2
×6
,
=(7
+2
)×6
,
=10×6.4,
=64.
3 |
5 |
=0.6×47+52×0.6+0.6,
=0.6×(47+52+1),
=0.6×100,
=60;
(2)5.72-1.84-1.16,
=5.72-(1.84+1.16),
=5.72-3,
=2.72;
(3)7
5 |
8 |
2 |
5 |
3 |
8 |
2 |
5 |
=(7
5 |
8 |
3 |
8 |
2 |
5 |
=10×6.4,
=64.
点评:完成此题,注意分析式中数据,运用恰当的运算定律或性质简算.
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