99999×22222=________
7.2×14.3÷0.8÷1.1×0.01=________
1.25×2.64+12.5×0.726+0.125=________.
99999×22222=________7.2×14.3÷0.8÷1.1×0.01=________1.25×2.64+12.5×0.726+0.125=______
答案:2 悬赏:40 手机版
解决时间 2021-12-23 07:45
- 提问者网友:未信
- 2021-12-23 04:34
最佳答案
- 五星知识达人网友:痴妹与他
- 2021-12-23 04:48
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.
故
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.
故
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- 1楼网友:舍身薄凉客
- 2021-12-23 06:26
正好我需要
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