问题 解答题

34.67-28.7(验算)

32.2÷4.2(保留一位小数)

32.8×(1.88÷4.7)

(21.88+29.8)÷7.6

5.2×(4.6÷0.92×0.04)

答案

①34.67-28.7=5.97,

验算:5.97+28.7=34.67;

②32.2÷4.2≈7.7;

③32.8×(1.88÷4.7),

=32.8×0.4,

=13.12;

④(21.88+29.8)÷7.6,

=51.68÷7.6,

=6.8;

⑤5.2×(4.6÷0.92×0.04),

=5.2×(5×0.04),

=5.2×0.2,

=1.04.

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