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1/2+2/3×括号3/4%1/6.脱式计算,能简便的要简便怎...

1/2+2/3×括号3/4-1/6。脱式计算 解:采用分配律, 原式=1/2+2/3x(3/4-1/6) =1/2+2/3x3/4-2/3x1/6 =1/2+1/2-1/9 =1-1/9 =8/9

1/2-1/4+3/6-1/8 =1/2+3/6-(1/4+1/8) =1/2+1/2-(2/8+1/8) =1-3/8=5/8

1/2 2/3×括号3/4-1/6括号除以7/9脱式计算 解: 1/2+ 2/3×(3/4-1/6)除以7/9 =1/2+2/3×7/12÷7/9 =1/2+1/2 =1

解: (1/6+3/4-2/3)*12 =1/6 *12+3/4 *12 -2/3 *12 =2+9-8 =11-8 =3

-1/42÷[1/2-1/3+5/7+4/9×(-6)] =-1/42÷(1/6+5/7-8/3) =-1/42÷(-25/14) =1/75

3.6×括号2/3+1/6-3/4的差 3.6×(2/3+1/6-3/4) =3.6x(5/6-3/4) =3.6x1/12 =0.3

一又1/24-2×括号3/8+1/6-3/4括回乘十二简便运算 一又1/24-2×括号3/8+1/6-3/4括回乘十二 =-25/24-2*(3/8+1/6-3/4)*12 =-25/24-24*3/8-24*1/6+24*3/4 =-25/24-9-4+18 =3又23/24

(1)13.6×3-40.6÷2,=40.8-20.3,=20.5;(2) 99×0.75+ 1 4 ×99 ,=99×(0.75+0.25),=99×1,=99;(3) ( 5 6 - 5 8 )×24 ,= 5 6 ×24- 5 8 ×24,=20-15,=5;(4) 121×100 1 121 ,=121×(100+ 1 121 ),=121×100+121× 1 121 ,=12100+1...

过程是首先把199219921992拆成199119911991+100010001然后把1992拆成1991+1就是1991*(199119911991+100010001)-(1991+1)*199119911991之后拆括号变成(1991*199119911991+1991*100010001)-(1991*199119911991+199119911991)之后...

分别是119,1486,184,18,691.24

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