Question

tính bằng hai cách  

(15+35)x2 ; (146-46)x25 ; 36x7+36x3

Answer 1

`C1:(15+35)xx2=50xx2=100`

`C2:(15+35)xx2=15xx2+35xx2=30+70=100`

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`C1:(146-46)xx25=100xx25=2500`

`C2:(146-46)xx25=146xx25-46xx25=3650-1150=2500`

__________________________________________________________

`C1:36xx7+36xx3=252+108=360`

`C2:36xx7+36xx3=36xx(7+3)=36xx10=360`

Answer 2

C1

`(15+35)xx2`

` = 50 xx 2`

` = 100`

C2

` 15 xx 2 + 35 xx 2`

` = 30 + 70`

` = 100`

_____________________________

C1

` ( 146 - 46) xx 25`

` = 100 xx 25`

` = 2500`

C2

` 146 xx 25 - 46 xx 25`

` = 3650 - 1150`

` = 2500`

________________________

C1

` 36 xx 7 + 36 xx 3`

` = 252 + 108`

` = 360`

C2

` 36 xx ( 7 + 3)`

` = 36 xx 10`

` = 360`

___________

` #Hoang`

Answer 3

`(15+35)xx2`

`=50xx2`

`=100`

`15xx2+35xx2`

`=30+70`

`=100`

______________

`(146-46)xx25`

`=100xx25`

`=2500`

`146xx25-46xx25`

`=3650-1150`

`=2500`

____________

`36xx7+36xx3`

`=252+108`

`=360`

`(7+3)xx36`

`=10xx36`

`=360`