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Crazy boy [7]
3 years ago
10

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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<h3>What is an expression?</h3>

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

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