Question

Tính nhanh:

a) 85*12,7+5+3+12,7

b)52*143-52*39-8*28

Answer 1

a) \(85\cdot12,7+5+3+12,7=12,7\left(85+1\right)+8=1092,2+8=1100,2\)

b) \(52\cdot143-52\cdot39-8\cdot28=52\left(143-39\right)-\left(-20\right)=52\cdot104+20=5408+20=5428\)