问题 解答题
脱式计算,能简算的要简算.
0.25×[(2.8+4.4)÷1.2]3.7×9.16+6.3×9.16
[32-(1.95-1.95)]÷1.65.7×10.1.
答案

(1)0.25×[(2.8+4.4)÷1.2],

=0.25×[7.2÷1.2],

=0.25×6,

=1.5;

(2)3.7×9.16+6.3×9.16,

=(3.7+6.3)×9.16,

=10×9.16,

=91.6;

(3)[32-(1.95-1.95)]÷1.6,

=[32-0]÷1.6,

=32÷1.6,

=20;

(4)5.7×10.1,

=5.7×(10+0.1),

=5.7×10+5.7×0.1,

=57+0.57,

=57.57.

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