Question

выполни вычитание числа из суммы

Answer 1

(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

Answer 2

(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