a)419 x 2 + 419 x 3 + 419 x 5
= 419 x ( 2 + 3 + 5 )
= 419 x 10
= 4190
b) 7020 x 7 - 7020 x 3 - 7020 x 4
= 7020 x ( 7 - 3 - 4 )
= 7020 x 1
= 7020
a, 419 x ( 2 + 3 +5)
= 419 x 10 = 4190.
b, 7020 x ( 7 - 3 - 4)
= 7020 x 0 = 0.
a)419*2+419*3+419*5
=419*(2+3+5)
=419*10
=4190
b)7020*7-7020*3-7020*4
=7020*(7-3-4)
=7020*0
=0
k cho mk nha bn
THANK YOU VERY MUCH
a) \(419\cdot2+419\cdot3+419\cdot5=419\left(2+3+5\right)\)
419*2+419*3+419*5
419*[2+3+4]
419*10
4190
7020*7-7020*3-7020*4
7020*[7-3-4]
7020*0
0