Выполни действия.
8 * 5;
7 * 6;
6 * 8;
27 : 3;
54 : 9;
49 : 7;
63 : 7 * 4;
42 : 6 * 8;
81 : 9 * 5;
72 − (12 + 30);
25 + (63 − 19);
90 − (54 − 26).
8 * 5 = 40;
7 * 6 = 42;
6 * 8 = 48;
27 : 3 = 9;
54 : 9 = 6;
49 : 7 = 7;
63 : 7 * 4 = 9 * 4 = 36;
42 : 6 * 8 = 7 * 8 = 56;
81 : 9 * 5 = 9 * 5 = 45;
72 − (12 + 30) = 72 − 42 = 30;
25 + (63 − 19) = 25 + 44 = 69;
90 − (54 − 26) = 90 − 28 = 62.