问题 解答题
0.89×0.48+0.89×0.520.25×13.7×0.44.2×101
3.6×99 2.5×32×1.25 0.125×88
56.5×99+56.5 (1.25-0.125)×845÷0.09÷0.5
17.8÷(1.78×4)
答案

0.89×4.8+0.89×0.52

=(0.48+0.52)×0.89,

=1×0.89,

=0.89;

0.25×13.7×0.4

=0.25×0.4×13.7,

=0.1×13.7,

=1.37;

4.2×101

=4.2×100+4.2,

=420+4.2,

=424.2;

3.6×99

=3.6×100-3.6,

=360-3.6,

=356.4;

2.5×32×1.25

=(2.5×4)×(1.25×8),

=10×10,

=100;

0.125×88

=0.125×8×11,

=1×11,

=11;

56.5×99+56.5

=(99+1)×56.5,

=100×56.5,

=5650;

(1.25-0.125)×8

=1.25×8-0.125×8,

=10-1,

=9;

45÷0.09÷0.5

=45÷(0.09×0.5),

=1000;

17.8÷(1.78×4)

=17.8÷1.78÷4,

=2.5.

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