Question Video: Addition and Subtraction of Numbers up to 99 Mathematics • 2nd Grade

40 +_ + 5 = 49.


Video Transcript

40 plus the missing number plus five equals 49.

In this question, we need to find the missing number, which when added to 40 plus five equals 49. We could use a number line to help us answer this question. Our number line begins at 40 and we need to reach number 49.

First, we need to add five. To do this, we need to count forward five places on the number line starting at number 40: one, two, three, four, five. 40 plus five equals 45. The question asks us how much we add to this number 45 to make 49. How many places do we need to skip forward on the number line? One, two, three, four.

Now, we can complete the missing number. 40 plus four plus five equals 49. We found the missing number four using a number line to help us count forward.

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