问题
解答题
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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.