99999×22222=________7.2×14.3÷0.8÷1.1×0.01=________1.25×2.64+12.5×0.726+0.125=______

发布时间:2020-08-07 14:09:54

99999×22222=________
7.2×14.3÷0.8÷1.1×0.01=________
1.25×2.64+12.5×0.726+0.125=________.

网友回答

2222177778    1.17    12.5
解析分析:算式(1)可将99999拆分为100000-1后,根据乘法分配律计算;
算式(2)可根据乘法交换律计算;
算式(3)可将式中的乘法算式变为具有相同因数的算式后再根据乘法分配律计算.


解答:(1)99999×22222
=(100000-1)×22222,
=100000×22222-22222×1,
=2222200000-22222,
=2222177778;
(2)7.2×14.3÷0.8÷1.1×0.01
=(7.2÷0.8)×(14.3÷1.1)×0.01,
=9×13×0.01,
=117×0.01,
=1.17;
(3)1.25×2.64+12.5×0.726+0.125
=1.25×2.64+1.25×7.26+1.25×0.1,
=1.25×(2.64+7.26+0.1),
=1.25×10,
=12.5.
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