Giúp mik và tính nhanh : 10+60+30+50+30+10+10+2+10+20+30+40+80+20+70+20+30+40+20+40
2 câu trả lời
=(10+10+10+10)+(20+20+20+20)+(30+30+30+30)+(40+40+40)`+(50+60)+(70+80)+2
`=40+80+120+120+110+150+2`
`=120+240+260+2`
`=360+262`
`=622`
10+60+30+50+30+10+10+2+10+20+30+40+80+20+70+20+30+40+20+40
=(10+10+10+10)+(20+20+20+20)+(30+30+30+30)+(40+40+40)+(50+60)+(70+80)+2
=(40+80)+(120+120)+(110+150)+2
=(120+240)+(260+2)
=360+262=622
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