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Balance Addition Equations - Within 100
Consider the equation:
35 + 12 = __ + 40
Let's identify the missing number that makes the equation true.
To find the missing number, first we need to add 35 + 12:
35 + 12 = ? + 40
47 = ? + 40
Now, let’s look for the number which when added to 40 gives 47.
47 = 7 + 40
35 + 12 = 7 + 40
So, the missing number is 7.