Sagot :

alice2cbn
a. 300 x 4 x 10*3 x 2 x 10*7 =
300 x 4 x 2 x (10*3+7) =
1200 x 2 x 10*10 =
2400 x 10*10
b. 8 x 10*-3 x10*7 x 7 x 10*-3 =
8 x 7 x (10*-3+7+ -3) =
56 x 10*1 =
56 x 10 =
560