Answer:
60
Explanation:
Add 6 to 50: 50+6=56. When you add 6 to 50 you get 56. After that add 4
(50+___)+4 the blank is 6
so: (50+6)+4
50+(___+4) the blank is 6
so: 50+(6+4)
50+___ the blank is 10
=60
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