问题 解答题

递等式计算.

60+40×25%

(1-20%)×30%

80÷(1-84%)

1.3×35%+8.7×35%

答案

(1)60+40×25%,

=60+10,

=70;

(2)(1-20%)×30%,

=80%×30%,

=0.24;

(3)80÷(1-84%),

=80÷16%,

=500;

(4)1.3×35%+8.7×35%,

=35%×(1.3+8.7),

=0.35×10,

=3.5.

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