问题 解答题

简便计算.

6.73-(3.73-2.24)

1.27+2.9+0.73+16.1

12.75-(1.1+2.75)

3.35-4.68+2.65.

答案

(1)6.73-(3.73-2.24)

=6.73-3.73-2.24

=3-2.24

=0.76;

(2)1.27+2.9+0.73+16.1

=(1.27+0.73)+(2.9+16.1)

=2+19

=21;

(3)12.75-(1.1+2.75)

=12.75-2.75-1.1

=10-1.1

=8.9;

(4)3.35-4.68+2.65

=3.35+2.65-4.68

=6-4.68

=1.32.

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