六分之七×十五分之十四×九 (三分之二-九分之一)×27 (八分之五+四分之三)×16

2024-11-15 15:28:31
推荐回答(2个)
回答1:

7/6x14/15x9
=49/45x9
=49/5

(2/3-1/9)x27
=2/3x27-1/9x27
=18-3
=15

(5/8+3/4)x16
=5/8x16+3/4x16
=10+12
=22

2/3x4/7+2/3x3/7
=2/3x(4/7+3/7)
=2/3x1
=2/3

回答2:

7/6+(14/15)*9=(7/3)*[1/2+(2/5)*9]=(7/3)*(1/2+18/5)=(7/3)*(41/10)=287/30
(2/3-1/9)*27=(2/3)*27-(1/9)*27=18-3=15
(5/8+3/4)*16=(5/8)*16+(3/4)*16=10+12=22
(2/3)*(4/7)+(2/3)*(3/7)=(2/3)*(4/7+3/7)=2/3