Вычисли удобным способом 1) (8*4)*5=2) 6*(8*10)=3) 3*(8*5)= 4)(7*5)*6=5) ( 9*20) *...

1)(8*4)*5=160
1.
$8 \times 4 = 32$
2.
$5 \times 32 = 160$
2)6*(8*10)=480
1.
$8 \times 10 = 80$
2.
$80 \times 6 = 480$
3)3*(8*5)=120
1.
$8 \times 5 = 40$
2.
$3 \times 40 = 120$
4)(7*5)*6=210
1.
$7 \times 5 = 35$
2.
$6 \times 35 = 210$
5)(9*20)*5=900
1.
$9 \times 20 = 180$
2.
$180 \times 5 = 900$
6)(20*5)*17=1700
1.
$20 \times 5 = 100$
2.
$100 \times 17 = 1700$
7)4*(40*5)=800
1.
$40 \times 5 = 200$
2.
$200 \times 4 = 800$
8)50*(2*3)=300
1.
$2 \times 3 = 6$
2.
$50 \times 6 = 300$