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7/2×5/8%3/2÷8/5的简便计算

7/2×5/8-3/2÷8/5的简便计算 7/2×5/8-3/2÷8/5 =7/2×5/8-3/2×5/8 =(7/2-3/2)×5/8 =2×5/8 =5/4=1.25

7/2x5/8-3/2÷8/5 =7/2x5/8-3/2×5/8 =5/8×(7/2-3/2) =5/8×2 =5/4

7/2x5/8-3/2÷8/5=7/2x5/8-3/2x5/8=(7/2-3/2)x5/8=5/4

X+3/5=8 解:X=8-3/5 X=7又2/5 3/8+5/7÷2/7 =3/8+5/2 =2又7/8 3/8+5/7x1/5 =3/8+1/7 =29/56

5/7-括号3/8-2/7括号用简便方法计算 =5/7-3/8+2/7 =5/7+2/7-3/8 =1-3/8 =5/8

这个题主要就是要注意:圆括号,加号、减号、乘号与取余的优先级与结合性。其中,圆括号优先级最高,乘号和取余第二,加号和减号最低结合性均是从左到右。 10 + 9 * ((8 + 7) % 6) + 5 * 4 % 3 * 2 + 3 =10 + 9 * (15% 6) + 5 * 4 % 3 * 2 + 3//...

第一个应该是3/8x8/3=ax(1/a)=1

3+56÷0.8-5.7 =3+70-5.7 =73-5.7 =67.3 (3/4×1/6+3/4×5/6)÷3/2简便计算 (3/4×1/6+3/4×5/6)÷3/2 =3/4*(1/6+5/6)÷3/2 =3/4*1*2/3 =1/2

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