Question

简便计算 7.5×3/5＋2.5÷5/3 2/9÷[5/6×（

简便计算
7.5×3/5＋2.5÷5/3

2/9÷[5/6×（4/5－2/3）]

Answer 1

1。 7.5X(3/5)+2.5除以(5/3)
=7.5X(3/5)+2.5X(3/5)
=(7.5+2.5)X(3/5)
=10X(3/5)
=6.
2。 (2/9)除以[(5/6)X(4/5-2/3)]
解： 因为 [(5/6)X(4/5-2/3)]除以(2/9)
=[(5/6)X(4/5-2/3)]X(9/2)
=(9/2)X(5/6)X(4/5)-(9/2)X(5/6)X(2/3)
=3-5/2
=1/2
所以 (2/9)除以[(5/6)X(4/5-2/3)]=2.

Answer 2

简便计算
7.5×3/5＋2.5÷5/3
= 7.5x3/5+2.5x3/5
= (7.5+2.5) x3/5
=10x3/5
=6

2/9÷[5/6×（4/5－2/3）]
=2/9÷[4/6-10/18]
=2/9÷[12/18-10/18]
=2/9x18/2
=2

Answer 3

7.5×3/5十2.5x3/5
(7.5十2.5)×3/5
|0x3/5二6

追答

Answer 4

7.5×3/5+2.5÷5/3
=7.5×3/5+2.5×3/5
=（7.5+2.5）×3/5
=10×3/5
=6

2/9÷ [ 5/6×（4/5-2/3） ]
=2/9÷ [ 5/6×（12/15-10/15） ]
=2/9÷ [ 5/6×2/15 ]
=2/9×6/5×15/2
=2