问题 解答题

30-0.06+9.92

108÷(0.45÷0.9)

(0.25+12.5)×4

5.2+9.8+2.2+4.8.

答案

(1)30-0.06+9.92,

=29.94+9.92,

=39.86;

(2)108÷(0.45÷0.9),

=108÷0.5,

=216;

(3)(0.25+12.5)×4,

=0.25×4+12.5×4,

=1+50,

=51;

(4)5.2+9.8+2.2+4.8,

=(5.2+9.8)+(2.2+4.8),

=15+7,

=22.

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