问题 解答题

递等式计算:

①(2.44-1.8)÷0.4

②2.9×1.4+2×0.16

③30.8÷[14-(9.85+1.07)].

答案

①(2.44-1.8)÷0.4,

=0.64÷0.4,

=1.6;

②2.9×1.4+2×0.16,

=4.06+0.32,

=4.38;

③30.8÷[14-(9.85+1.07)],

=30.8÷[14-10.92],

=30.8÷3.08,

=10.

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