200乘30.6% 580除58% 140乘50. - 知识问答

200乘30.6% 580除58% 140乘50.4% 80乘60% 700除50% 20加80% 600除10 % 1

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200乘30.6% =61.2
580除58% =580×100/58=1000
140乘50.4% =705.6
80乘60% =48
700除50% =1400
20加80% =20.8
600除10 % =6000
120%减78%=42%=0.42

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