问题 解答题
0.8×0.94×12.50.68×99+0.68
0.48×8.5+0.48×1.518.6×1.37-18.6×0.37
18.8×101-18.81.02×6.5.
答案

(1)0.8×0.94×12.5

=0.8×12.5×0.94

=10×0.94

=9.4;

(2)0.68×99+0.68

=0.68×(99+1)

=0.68×100

=68;

(3)0.48×8.5+0.48×1.5

=0.48×(8.5+1.5)

=0.48×10

=4.8;

(4)18.6×1.37-18.6×0.37

=18.6×(1.37-0.37)

=18.6×1

=18.6;

(5)18.8×101-18.8

=18.8×(101-1)

=18.8×100

=1880;

(6)1.02×6.5

=(1+0.02)×6.5

=1×6.5+0.02×6.5

=6.5+0.13

=6.63.

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