giúp mình nhá tính nhanh :a)6,24:0,25-4*6,24+2020 b)tìm x x*0,99+x:100=2021 06/12/2021 Bởi Faith giúp mình nhá tính nhanh :a)6,24:0,25-4*6,24+2020 b)tìm x x*0,99+x:100=2021
`a)6,24:0,25-4×6,24+2020` `=6,24×4-4×6,24+2020` `=6,24×(4-4)+2020` `=2020` `b)x×0,99+x:100=2021` `→x×99/100+x×1/100=2021` `→x×(99/100+1/100)=2021` `→x×1=2021` `→x=2021` Vậy `x=2021` Bình luận
a)6,24:0,25−4×6,24+2020 =6,24×4−4×6,24+2020 =6,24×(4−4)+2020 =2020 b)x×0,99+x:100=2021 =x×99/100+x×1/100=2021 =x×(99/100+1/100)=2021 =x×1=2021 =x=2021 Vậy x=2021 Chúc bn học tốt ! Bình luận
`a)6,24:0,25-4×6,24+2020`
`=6,24×4-4×6,24+2020`
`=6,24×(4-4)+2020`
`=2020`
`b)x×0,99+x:100=2021`
`→x×99/100+x×1/100=2021`
`→x×(99/100+1/100)=2021`
`→x×1=2021`
`→x=2021`
Vậy `x=2021`
a)6,24:0,25−4×6,24+2020
=6,24×4−4×6,24+2020
=6,24×(4−4)+2020
=2020
b)x×0,99+x:100=2021
=x×99/100+x×1/100=2021
=x×(99/100+1/100)=2021
=x×1=2021
=x=2021
Vậy x=2021
Chúc bn học tốt !