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(x-140-150)×0.75÷410=(x-140-345-30)×0.75÷210 求x 詳細(xì)地址計(jì)算過(guò)程 這考試怎么辦 會(huì)寫(xiě)式子 不會(huì)算結(jié)果
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速問(wèn)速答計(jì)算x的公式如下:
(x-140-150)×0.75÷410 = (x-140-345-30)×0.75÷210
首先,將式子整理成“等式”形式:
(x-140-150)×0.75÷410 - (x-140-345-30)×0.75÷210 = 0
將上式進(jìn)行簡(jiǎn)單計(jì)算:
x-140-150 = (x-140-345-30)
即:
x-140-150-x+140+345+30 = 0
將上式進(jìn)行簡(jiǎn)單計(jì)算:
-150-x+x = -345-30
即:
-150 = -345-30
再進(jìn)行簡(jiǎn)單計(jì)算:
-150+345+30 = x
即:
x = 225
故,當(dāng)(x-140-150)×0.75÷410 = (x-140-345-30)×0.75÷210時(shí),x=225。
拓展知識(shí):
關(guān)于分?jǐn)?shù)的運(yùn)算,涉及的知識(shí)點(diǎn)包括大于、小于、等于、加減乘除等等,運(yùn)算時(shí)需要先將分?jǐn)?shù)轉(zhuǎn)換成混合數(shù),然后進(jìn)行計(jì)算,最后再將結(jié)果轉(zhuǎn)換回分?jǐn)?shù)。比如:
計(jì)算3/5+2/3:
先將分?jǐn)?shù)轉(zhuǎn)換成混合數(shù):3/5=15/5,2/3=10/3
將轉(zhuǎn)換后的混合數(shù)計(jì)算:15/5+10/3=25/5+30/5=55/5
將結(jié)果轉(zhuǎn)換回分?jǐn)?shù):55/5=11/1=11
2023 01/20 10:58
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