Question

用简便计算 6.27x3.6+37.8x0.36 13.5x2.5-0.35x25

被选为满意答案还有20赏分

Answer 1

1. 6.27*3.6+37.8*0.36
=6.27*3.6+3.78*3.6
=(6.27+3.78)*3.6
=10.05*3.6
=36.18

2. 13.5*2.5-0.35*25
=13.5*2.5-3.5*2.5
=(13.5-3.5)*2.5
=10*2.5
=25

追问

谢谢

追答

应该没错吧？

追问

没错

Answer 2

6.27x3.6+37.8x0.36
=6.27x3.6+3.78x3.6
=3.6×（6.27+3.78）
=3.6×10.05
=3.6×10+3.6×0.05
= 36+0.18
=36.18
13.5x2.5-0.35x25
=13.5x2.5-3.5x2.5
=（13.5-3.5）×2.5
=10×2.5
=25

Answer 3

6.27x3.6+37.3x0.36
=6.27×3.6+3.73×3.6
=(6.27+3.73)×3.6
=10×3.6
=36

13.5x2.5-0.35x25
=1.35×25-0.35×25
=(1.35-0.35)×25
=25

追问

是37.8

Answer 4

6.27x3.6+37.8x0.36=6.27*3.6+37.8*3.6*0.1=6.27*3.6+3.78*3.6=3.6*(6.27+3.78)=3.6*10.05
=3.6*10+3.6*0.05=36+0.18=36.18

13.5x2.5-0.35x25
=13.5x2.5-3.5x2.5
=（13.5-3.5）×2.5
=10×2.5
=25