Выполни вычитание числа из суммы
(50+7)-20=(50-20)+7=30+7=37 (70+5)-50=(70-50)+5=20+5=25 (80+9)-30=(80-30)+9=50+9=59 (40+5)-10=(40-10)+5=30+5=35 (90+8)-70=(90-70)+8=20+8=28 (50+3)-40=(50-40)+3=10+3=13
(50 + 7) - 20 = (50 - 20) + 7 = 37 (70 + 5) - 50 = (70 - 50) + 5 = 25 (80 + 9) - 30 = (80 - 30) + 9 = 59 (40 + 5) - 10 = (40 - 10) + 5 = 35 (90 + 8) - 70 = (90 - 70) + 8 = 28 (50 + 3) - 40 = (50 - 40) + 3 = 13