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7/18括号3/4-1/8括号的递等式怎么列

前面-1/4,后面恕我每笔口算不出

您好: 2/3+1/4-5/6 =8/12+3/12-10/12 =1/12 5/6+7/15-7/9 =75/90+42/90-70/90 =47/90 2+7/8-(3/5-0.4) =2+7/8-3/5+2/5 =2+7/8-1/5 =2+35/40-8/40 =2又27/40 如果本题有什么不明白可以追问,如果满意请点击“采纳为满意回答” 如果有其他问题请...

4/3—(2/5+3/1O丿=4O/3O一{I2/30+9/3o)=4o/30_21/3o=丨9/30先通分再计算

(1)7/8÷3/4+7/8x2/3 =7/8x4/3+7/8x2/3 =7/8x(4/3+2/3) =7/8x2 =7/4 (2)0.45×1/6÷0.45x1/6 =(0.45÷0.45)x(1/6x1/6) =1x1/36 =1/36 (3)4.8÷5/13-4又4/5x1.6 =4.8x13/5-4.8x8/5 =4.8x(13/5-8/5) =4.8x1 =4.8

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