3 years ago

When you add 9 to me, the sum is the same as 10 + 10

Mathematics

2 answers:

melisa1 [442]3 years ago

6 0

10+10 equals 20

blank+9 equals 20

9+11 equals 20

Answer=11

Otrada [13]3 years ago

4 0

11 is the answer.
10+10=20
20-9=11
11+9=20
11

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