Question

脱式计算(能简算的，要简算) (2/5加1/3)乘以15 8/9乘2

脱式计算(能简算的，要简算)
(2/5加1/3)乘以15 8/9乘2/3加8/9乘1/3
(3/10加4/5加1/2)乘以50 5/11乘与8/3乘以4/9

Answer 1

追问

能不能重发最后两条

追答

Answer 2

（2/5+1/3）×15
=2/5×15+1/3×15
=6+5
=11
8/9×2/3+8/9×1/3
=（1/3+2/3）×8/9
=8/9
（3/10+4/5+1/2）×50
=3/10×50+4/5×50+1/2×50
=15+40+25
=80
5/11×8/3×4/9
=40/33×4/9
=160/297