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viktelen [127]
3 years ago
8

Can you help me on number 3

Mathematics
1 answer:
katovenus [111]3 years ago
7 0

Answer:

it is 11

Step-by-step explanation:

if you add 15 and 13 you get 28.

39-28= 11

then you check your work

15+13=28+11=39

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