简便运算
41.2乘8.1+11乘9又4分之1+537乘0.19简便运算提示:把537分解成(412+125)...
41.2乘8.1+11乘9又4分之1+537乘0.19
简便运算
提示:把537分解成(412+125) 展开
简便运算
提示:把537分解成(412+125) 展开
展开全部
41.2 * 8.1 + 11 * 9.25 + 537 * 0.19
= 41.2 * 8.1 + 11 * 9.25 + (412 + 125) * 0.19
= 41.2 * 8.1 + 1.1 * 92.5 + 41.2 * 1.9 + 12.5 * 1.9
= 41.2 * (8.1 + 1.9) + 1.1 * 92.5 + 12.5 * (3 - 1.1)
= 412 + 1.1 * 92.5 + 12.5 * 3 - 12.5 * 1.1
= 412 + 1.1 * (92.5 - 12.5) + 37.5
= 412 + 1.1 * 80 + 37.5
= 412 + 88 + 37.5
= 537.5
= 41.2 * 8.1 + 11 * 9.25 + (412 + 125) * 0.19
= 41.2 * 8.1 + 1.1 * 92.5 + 41.2 * 1.9 + 12.5 * 1.9
= 41.2 * (8.1 + 1.9) + 1.1 * 92.5 + 12.5 * (3 - 1.1)
= 412 + 1.1 * 92.5 + 12.5 * 3 - 12.5 * 1.1
= 412 + 1.1 * (92.5 - 12.5) + 37.5
= 412 + 1.1 * 80 + 37.5
= 412 + 88 + 37.5
= 537.5
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