问题 解答题

0.78÷3.9×4.2

7.9÷3.16-5.4×0.2

3.2÷l.6×4

4.32-2.46÷6.

答案

(1)0.78÷3.9×4.2,

=0.2×4.2,

=0.84;

(2)7.9÷3.16-5.4×0.2,

=2.5-1.08,

=1.42;

(3)3.2÷l.6×4,

=2×4,

=8;

(4)4.32-2.46÷6,

=4.32-0.41,

=3.91.

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