问题 解答题

脱式计算.(能简算的要简算)

17.68÷5.2+3.4

30.6×1.5÷5.1

3.2×2.08-0.6

3.8÷2.5÷4.

答案

(1)17.68÷5.2+3.4

=3.4+3.4,

=6.8;

(2)30.6×1.5÷5.1,

=30.6÷5.1×1.5,

=6×1.5,

=9;

(3)3.2×2.08-0.6,

=6.656-0.6,

=6.056;

(4)3.8÷2.5÷4,

=3.8÷(2.5×4),

=3.8÷10,

=0.38.

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