28 + 42 : 7 − 6;
96 − 72 : 9 + 15;
32 + 56 : 8 − 7;
100 − 7 * 8;
90 − 8 * 8;
80 − 9 * 8;
74 : ☐ = 8 (ост.☐);
65 : ☐ = 7 (ост.☐);
85 : ☐ = 9 (ост.☐).
28 + 42 : 7 − 6 = 28 + 6 − 6 = 28 + 0 = 28;
96 − 72 : 9 + 15 = 96 − 8 + 15 = 88 + 15 = 103;
32 + 56 : 8 − 7 = 32 + 7 − 7 = 32 + 0 = 32;
100 − 7 * 8 = 100 − 56 = 44;
90 − 8 * 8 = 90 − 64 = 26;
80 − 9 * 8 = 80 − 72 = 8;
74 : 9 = 8 (ост.2);
65 : 9 = 7 (ост.2);
85 : 9 = 9 (ост.4).