问题 解答题

(1)0.3+9.7×0.23

(2)91.6-3.8-6.62

(3)1.03×(8.8÷0.25)

(4)2.23×7.5-2.23+3.5×2.23

(5)1.2÷[(5.1-3.6)×0.08]

(6)99.9+9.9+0.9+0.3.

答案

(1)0.3+9.7×0.23,

=0.3+2.231,

=2.531;

(2)91.6-3.8-6.62,

=87.8-6.62,

=81.18;

(3)1.03×(8.8÷0.25),

=1.03×35.2,

=36.256;

(4)2.23×7.5-2.23+3.5×2.23,

=2.23×(7.5-1+3.5),

=2.23×10,

=22.3;

(5)1.2÷[(5.1-3.6)×0.08],

=1.2÷[1.5×0.08],

=1.2÷0.12,

=10;

(6)99.9+9.9+0.9+0.3,

=(100-0.1)+(10-0.1)+(1-0.1)+0.1,

=111-0.3+0.3,

=111.

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