Вычислите, используя распределительный закон:
а) 37 * 12 + 37 * 88;
б) 7 * 12 + 8 * 7;
в) 37 * 12 − 37 * 2;
г) 7 * 102 − 2 * 7;
д) 28 * 9 + 22 * 9;
е) 25 * 11 − 25 * 1;
ж) 18 * 9 + 18 * 1;
з) 25 * 99 + 25;
и) 101 * 17 − 17;
к) 41 * 50 − 50.
37 * 12 + 37 * 88 = 37 * (12 + 88) = 37 * 100 = 3700
7 * 12 + 8 * 7 = 7 * (12 + 8) = 7 * 20 = 140
37 * 12 − 37 * 2 = 37 * (12 − 2) = 37 * 10 = 370
7 * 102 − 2 * 7 = 7 * (102 − 2) = 7 * 100 = 700
28 * 9 + 22 * 9 = 9 * (28 + 22) = 9 * 50 = 450
25 * 11 − 25 * 1 = 25 * (11 − 1) = 25 * 10 = 250
18 * 9 + 18 * 1 = 18 * (9 + 1) = 18 * 10 = 180
25 * 99 + 25 = 25 * 99 + 25 * 1 = 25 * (99 + 1) = 25 * 100 = 2500
101 * 17 − 17 = 101 * 17 − 17 * 1 = 17 * (101 − 1) = 17 * 100 = 1700
41 * 50 − 50 = 41 * 50 − 50 * 1 = 50 * (41 − 1) = 50 * 40 = 2000