题目内容
1.计算下列各题.0.45×12×0.2 | 6.2×2.1-2.1 | 2.8-2.8×0.15 |
2.8×1.43+0.57 | 10-6.06+8.5 | 6×0.25×1.8. |
分析 (1)、(5)、(6)按照从左向右的顺序进行计算;
(2)、(3)先算乘法,再算减法;
(4)先算乘法,再算加法.
解答 解:(1)0.45×12×0.2
=5.4×0.2
=1.08;
(2)6.2×2.1-2.1
=13.02-2.1
=10.92;
(3)2.8-2.8×0.15
=2.8-0.42
=2.38;
(4)2.8×1.43+0.57
=4.004+0.57
=4.574;
(5)10-6.06+8.5
=3.94+8.5
=12.44;
(6)6×0.25×1.8
=1.5×1.8
=2.7.
点评 考查了小数四则混合运算,注意运算顺序和运算法则,然后再进一步计算.
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