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-14×3/4-5×3/8 1/4×(-14)一5/8×5

-14×3/4-5×3/8 =-42/4-15/8 =-82/8-15/8 =-97/8 1/4×(-14)一5/8×5 =-1/56-5/40 =-5/280-35/280 =-40/280 =-1/7

-14x3/4-5x3/8+1/4x(-14)-5/8x5=-21/2-15/8-7/2-25/8=(-21/2-7/2)+(-15/8-25/8)=-14-5=-19。

=1/4*3/8+5/8*1/4 =(3/8+5/8)*1/4 =1*1/4 =1/4

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

(负14)x3/4-5x3/8+ 1/4x(负14)-5/8x5 =(-14)×(3/4+1/4)-5×(3/8+5/8) =(-14)×1-5×1 =-14-5 =-19

(3/4 +1/8)×5/14 =(7/8)X(5/14) =5/16

0.75化成 分数为3/4 原式=3/4+3/4x 5/8-3/8x3/4 (提取公因式3/4) =3/4(1+5/8-3/8) (将括号内的进行加减计算) =3/4x4/5 (约分) =3/5

5/8x3/4+1/4x5/8+5/8 =(3/4+1/4+1)×5/8 =2×5/8 =5/4 4分之5

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