分析:①5×1.25×2×8×11,運用乘法交換律和結(jié)合律簡算;
②1.5÷1.25,根據(jù)商不變的性質(zhì)簡算;
③67-(14.67+15.3),根據(jù)減法的運算性質(zhì)簡算;
④100.1×99+100.1,運用乘法分配律簡算;
⑤4×0.125×12.5,運用乘法結(jié)合律簡算;
⑥63×10.1,運用乘法分配律簡算;
⑦0.4×1.38×25÷0.46,運用乘法交換律和結(jié)合律簡算;
⑧70.1-9.9,根據(jù)減法的運算性質(zhì)簡算.
解答:解:①5×1.25×2×8×11
=(5×2)×(1.25×8)×11
=10×10×11
=1100;
②1.5÷1.25
=(1.5×8)÷(1.25×8)
=12÷10
=1.2;
③67-(14.67+15.3)
=67-29.97
=67-(30-0.03)
=67-30+0.03
=37.03;
④100.1×99+100.1
=100.1×(99+1)
=100.1×100
=10010;
⑤4×0.125×12.5
=(4×0.125)×12.5
=0.5×12.5
=6.25;
⑥63×10.1
=63×10+63×0.1
=630+6.3
=636.3;
⑦0.4×1.38×25÷0.46
=(0.4×25)×(1.38÷0.46)
=10×3
=30;
⑧70.1-9.9
=70.1-(10-0.1)
=70.1-10+0.1
=60.2.
點評:此題考查的目的是理解掌握乘法的運算定律、減法、除法的運算性質(zhì),并且能夠靈活運用這些運算定律和運算性質(zhì)進行簡便計算.