Question

Составь все возможные разности,используя следующие выражения:15÷5;27÷9;40-9;12+8

Answer 1

здравствуйте.

$(15 \div5 ) - (27 \div 9) = 0 \\ (15 \div 5) - (40 - 9) = - 28 \\ (15 \div 5) - (12 + 8) = - 17 \\ (15 \div 5) - (15 \div 5) = 0$
$(27 \div 9) - (15 \div 5) = 0 \\ (27 \div 9) - (27 \div 9) = 0 \\ (27 \div 9) - (40 - 9) = - 28 \\ (27 \div 9) - (12 + 8) = - 17$
$(40 - 9) - (15 \div 5) = 28 \\ (40 - 9) - (27 \div 9) = 28 \\ (40 - 9) - (40 - 9) = 0 \\ (40 - 9) - (12 + 8) = 11$
$(12 + 8) - (12 + 8) = 0 \\ (12 + 8) - (40 - 9) = - 11 \\ (12 + 8) - (27 \div 9) = 17 \\ (12 + 8) - (15 \div 5) = 17$

удачи.