Final answer:
To find the missing number in 9+4=?, we can switch the order of the numbers and get 4+9, which equals 13.
Step-by-step explanation:
To find the missing number, we can use the concept of inverse operations. Since 4+9=13, to find the missing number in 9+4=?, we can simply switch the order of the numbers and get 4+9, which equals 13. So the missing number is 13.
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