Вычисли: 4. 18-7 17-8 19.6 106-7-107-6 203-4-204-3 150・6-160.5 180-120-5:6 210-140-5:7 240-160-5:8

Решение: * $$18 - 7 = 11$$ * $$17 - 8 = 9$$ * $$19 \times 6 = 114$$ * $$106 - 7 = 99; 107 - 6 = 101$$ * $$203 - 4 = 199; 204 - 3 = 201$$ * $$150 \times 6 = 900; 160 \times 5 = 800$$ * $$180 - 120 = 60; 5 : 6 = 0.833...; 60 - 0.833... = 59.166...$$ * $$210 - 140 = 70; 5 : 7 = 0.714...; 70 - 0.714... = 69.285...$$ * $$240 - 160 = 80; 5 : 8 = 0.625; 80 - 0.625 = 79.375$$ Ответ: * $$18 - 7 = 11$$ * $$17 - 8 = 9$$ * $$19 \times 6 = 114$$ * $$106 - 7 = 99; 107 - 6 = 101$$ * $$203 - 4 = 199; 204 - 3 = 201$$ * $$150 \times 6 = 900; 160 \times 5 = 800$$ * $$180 - 120 - 5 : 6 = 59.166...$$ * $$210 - 140 - 5 : 7 = 69.285...$$ * $$240 - 160 - 5 : 8 = 79.375