Question

a, 420:12+540:12+240:12

b.357x206-108x357+357+357

Answer 1

`a)`

`420:12+540:12+240:12`

`=(420+540+240)/12`

`= 1200/12`

`= 100`

`b)`

`357xx206-108xx357+357+357`

`=357xx(206-108 +2)`

`=357xx 100`

`=35700`

Answer 2

a: =(420+540+240)/12=1200/12=100

b: =357(206-108+2)=35700

Answer 3

a) 420 : 12 + 540 : 12 + 240 : 12

= ( 420 + 540 + 240 ) : 12

= 1200 : 12

= 100

b) 357 x 206 - 108 x 357 + 357 + 357

= 357 x ( 206 - 108 + 1 + 1 )

= 357 x 100

= 35700