问题 解答题

80.64÷25.6-3.14

0.42÷(0.3×0.7)

8.7÷2.5÷4

17.5÷12.5×1.4.

答案

(1)80.64÷25.6-3.14,

=3.15-3.14,

=0.01;

(2)0.42÷(0.3×0.7),

=0.42÷0.21,

=2;

(3)8.7÷2.5÷4,

=8.7÷(2.5×4),

=8.7÷10,

=0.87;

17.5÷12.5×1.4,

=1.4×1.4,

=1.96.

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