Question

简便计算积极急急急急急急急急急急急急

3/15×8/9＋3/15÷9/8
0.6X＋0.6×3.5=2.8

Answer 1

3/15×8/9＋3/15÷9/8
=3/15 x 8/9 + 3/15 x 8/9
= (3x8)x2/(15x9)
= 16/ 45

0.6X＋0.6×3.5=2.8
0.6x = 2.8 -0.6x3.5
x= 28/6 - 3.5
= 14/3 - 7/2
= ( 28-21) /6
=7/6

追问

85×3/86

追答

85×3/86 = 255/86

Answer 2

3/15×8/9＋3/15÷9/8=3/15×8/9＋3/15x8/9=2x3/15x8/9=16/45
0.6X＋0.6×3.5=2.8
0.6x=2.8-2.1
x=7/6