问题 解答题
递等式计算,能简算的要简算:
9.7-22.78÷3.41.05÷0.7+18.90.4×5÷0.4×5
21÷0.25÷0.40.125×32×0.2582.2×9.9.
答案

9.7-22.78÷3.4

=9.7-6.7,

=3;

1.05÷0.7+18.9

=1.5+18.9,

=20.4;

0.4×5÷0.4×5

=2÷0.4×5,

=5×5,

=25;

21÷0.25÷0.4

=21÷(0.25×0.4),

=21÷0.1,

=210;

0.125×32×0.25

=(0.125×8)×(4×0.25),

=1×1,

=1;

82.2×9.9

=82.2×(10-0.1),

=82.2×10-82.2×0.1,

=822-8.22,

=813.78.

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