Question

怎样简算？

Answer 1

1.2*2.5+0.8*2.5
=2.5*（1.2+0.8）
=2.5*2
=5

1.01*2.6
=（1+0.01）*2.6
=1*2.6+0.01*2.6
=2.6+0.026
=2.626

Answer 2

50x013x0.2
=50×0.2×0.13
＝10×0.13
＝1.3

追问

追答

1.2x2.5+0.8x2.5
=（1.2+0.8）x2.5
=2x2.5
=5
1.01x2.6
=1x2.6+0.01x2.6
=2.6+0.026
=2.626

Answer 3

50×0.2×0.13
=10×0.13
=1.3

追问

追答

（1.2+0.8）×2.5
=2×2.5
=5

1×2.6+0.1×2.6
=2.6＋0.26
=2.86

Answer 4

50*0.2*0.13=10*0.13=1.3

追答

*就是乘号

就是0.2和0.13换个位置

Answer 5

50×0.2×0.13