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4.0五 37.85简便运算

4.05+37.85=(4+0.05)+(37+0.85)=(4+37)+(0.05+0.85)=41+0.9=41.9

41.9

4+37+0.05+0.85 =41+0.9=41.9

(4+0.05)+37.85 =4+(0.05+37.85) =4+37.95 =41.95

你好!4.05+37.85=(4+37)+(0.05+0.85)=41+0.9=41.9仅代表个人观点,不喜勿喷,谢谢.

=4.4x5x0.5=22x0.5=11

原式=4/5x4/5+5/4x4/5=16/25+1=1又16/25

4.4*4.5=2.2*2*4.5=2.2*(2*4.5)=2.2*9=19.8

解析:原式子变为2/5*8+2/5=2/5*(8+1)=2/5*9=18/5

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