Răspuns :
▪Raspuns :
• 40 + 30 = 70
• 40 - 30 = 10
• 60 + 40 = 100
• 60 - 40 = 20
• 70 + 20 = 90
• 70 - 20 = 50
• 40 + 30 = 70
• 40 - 30 = 10
• 60 + 40 = 100
• 60 - 40 = 20
• 70 + 20 = 90
• 70 - 20 = 50