7.5ᘧ࿾0.8锧1.2ᘧ࿾12.5怎么简算锧2.5ᘧ࿾1.6?

2024年11月30日 09:56
有5个网友回答
网友(1):

2.5×1.6可以变成5×0.8,所以原式=(7.5+5)×0.8+1.2×12.5=12.5×0.8+1.2×12.5=12.5×(0.8+1.2)=12.5×2=25

网友(2):

7.5×0.8+1.2×12.5+2.5×1.6
=(2.5×3)×0.8+1.2×(5×2.5)+2.5×1.6
=2.5×(3×0.8)+(1.2×5)×2.5+2.5×1.6
=2.5×2.4+6×2.5+2.5×1.6
=2.5×(2.4+6+1.6)
=2.5×10
=25

网友(3):

7.5*0.8+1.2*12.5+2.5*1.6
=3*0.8*2.5+1.2*5*2.5+1.6*2.5
=2.4*2.5+6*2.5+1.6*2.5
=(2.4+6+1.6)*2.5
=10*2.5
=25

网友(4):

7.5×0.8+1.2×12.5+2.5×1.6
=6+15+4
=25

网友(5):

7.5*0.8+1.2*12.5+2.5*1.6
=6+1.2*25/2+5/2*1.6
=6+15+4
=25