题目内容
【题目】计算下面各题,能用简便算法的要用简便方法计算.
0.25×7×4
1.23×9.4+0.77×9.4
(16.8+1.47)÷0.7
0.01×(1.8+4.2÷0.15)
【答案】7;18.8;26.1;0.298
【解析】
(1)0.25×7×4
=0.25×4×7
=1×7
=7
(2)1.23×9.4+0.77×9.4
=(1.23+0.77)×9.4
=2×9.4
=18.8
(3)(16.8+1.47)÷0.7
=18.27÷0.7
=26.1
(4)0.01×(1.8+4.2÷0.15)
=0.01×(1.8+28)
=0.01×29.8
=0.298
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