问题 解答题

脱式计算,能简算的要简算.

0.89×4.8+0.89×5.2

9.4×0.96÷(5.4÷0.9)

(8+0.8)×1.25

0.175÷0.25÷0.4.

答案

(1)0.89×4.8+0.89×5.2

=0.89×(4.8+5.2)

=0.89×10

=8.9;

(2)9.4×0.96÷(5.4÷0.9)

=9.4×0.96÷6

=9.024÷6

=1.504;

(3)(8+0.8)×1.25

=8×1.25+0.8×1.25

=10+1

=11;

(4)0.175÷0.25÷0.4

=0.175÷(0.25×0.4)

=0.175÷0.1

=1.75.

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