题目内容
62
×89.45+179×37.56+89
×62.44=
11 |
25 |
11 |
20 |
17900
17900
.分析:根据数字特点,原式变为62.44×89.45+179×37.56+89.55×62.44,运用乘法分配律先计算62.44×89.45和89.55×62.44,然后再次运用乘法分配律进行简算.
解答:解:62
×89.45+179×37.56+89
×62.44,
=62.44×89.45+179×37.56+89.55×62.44,
=62.44×(89.45+89.55)+179×37.56,
=62.44×179+179×37.56,
=(62.44+37.56)×179,
=100×179,
=17900;
故答案为:17900.
11 |
25 |
11 |
20 |
=62.44×89.45+179×37.56+89.55×62.44,
=62.44×(89.45+89.55)+179×37.56,
=62.44×179+179×37.56,
=(62.44+37.56)×179,
=100×179,
=17900;
故答案为:17900.
点评:完成此题,注意分析式中数据,根据数字特点,运用运算定律,灵活简算.
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