Реши примеры: a) 40 – 2 54 + 6 30 – 13 20 + 65 70 – 6 17 + 43 б) 27 + 33 – 4 74 – 4 – 45 2 + 78 – 52 100 – 10 + 8 100 – 1 – 63 72 + 28 – 0

Решение:

а)

• 40 – 2 = 38
• 54 + 6 = 60
• 30 – 13 = 17
• 20 + 65 = 85
• 70 – 6 = 64
• 17 + 43 = 60

б)

• 27 + 33 – 4 = 56
• 74 – 4 – 45 = 25
• 2 + 78 – 52 = 28
• 100 – 10 + 8 = 98
• 100 – 1 – 63 = 36
• 72 + 28 – 0 = 100