Câu hỏi của Vũ Thị Thu Dương

Question

tính nhanha 20,11x 7,5 +20,11+20,1120,11x05b 2,5 x 12,85x4

Nguyễn Lê Phước Thịnh · Accepted Answer

a: $20,11\cdot7,5+20,11+20,11+20,11\cdot0,520,11\cdot7,5+20,11+20,11+20,11\cdot0,5$

$=20,11(7,5+1+1+0,5)=20,11(7,5+1+1+0,5)$

$=20,11\cdot10=201,1=20,11\cdot10=201,1$

b: $2,5\cdot12,85\cdot42,5\cdot12,85\cdot4$

$=12,85\cdot(2,5\cdot4)=12,85\cdot(2,5\cdot4)$

$=12,85\cdot10=128,5=12,85\cdot10=128,5$

Đinh Hải Tùng · Answer

a: 20,11⋅7,5+20,11+20,11+20,11⋅0,520,11⋅7,5+20,11+20,11+20,11⋅0,5=20,11(7,5+1+1+0,5)=20,11(7,5+1+1+0,5)=20,11⋅10=201,1=20,11⋅10=201,1b: 2,5⋅12,85⋅42,5⋅12,85⋅4=12,85⋅(2,5⋅4)=12,85⋅(2,5⋅4)=12,85⋅10=128,5Câu trả lời: a: 20,11⋅7,5+20,11+20,11+20,11⋅0,520,11⋅7,5+20,11+20,11+20,11⋅0,5=20,11(7,5+1+1+0,5)=20,11(7,5+1+1+0,5)=20,11⋅10=201,1=20,11⋅10=201,1b: 2,5⋅12,85⋅42,5⋅12,85⋅4=12,85⋅(2,5⋅4)=12,85⋅(2,5⋅4)=12,85⋅10=128,5

gia linh · Answer

a: 20,11⋅7,5+20,11+20,11+20,11⋅0,520,11⋅7,5+20,11+20,11+20,11⋅0,5=20,11(7,5+1+1+0,5)=20,11(7,5+1+1+0,5)=20,11⋅10=201,1=20,11⋅10=201,1b: 2,5⋅12,85⋅42,5⋅12,85⋅4=12,85⋅(2,5⋅4)=12,85⋅(2,5⋅4)=12,85⋅10=128,5=12,85⋅10=128,5   Câu trả lời: a: 20,11⋅7,5+20,11+20,11+20,11⋅0,520,11⋅7,5+20,11+20,11+20,11⋅0,5=20,11(7,5+1+1+0,5)=20,11(7,5+1+1+0,5)=20,11⋅10=201,1=20,11⋅10=201,1b: 2,5⋅12,85⋅42,5⋅12,85⋅4=12,85⋅(2,5⋅4)=12,85⋅(2,5⋅4)=12,85⋅10=128,5=12,85⋅10=128,5

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