Show how you work this out!
69 + ? = 120
69 + 31 = 100
100 + 20 = 120
69 + 51 = 120
Samoa has $69 to buy a new Laptop. She needs $120 to buy it. How much money does Samoa need to buy the new Laptop?
69 + 31 = 100
100 + 20 = 120
69 + 51 = 120
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