Video: Using Part-Whole Models to Compare Addition Expressions

Pick the correct symbol to compare the sums.

02:14

Video Transcript

Pick the correct symbol to compare the sums. Three plus two what four plus one. Hint: Make models and think about the sum. Less than, equal to, or greater than.

In this question, we have to pick the correct symbol to compare the sums, three plus two and four plus one. We have to decide if three plus two is less than four plus one, equal to four plus one, or if three plus two is greater than four plus one. We’re also given a hint. We’re told to make models and to think about the sum. We’re shown two part-part-whole models. The first model represents the sum three plus two. What is three plus two? We can use the bricks to help us. Three and two more is five. Three, four, five.

So we know the sum of three plus two is five. In our second model, we have to find the sum of four and one. Four and one more makes five. Four plus one is five. So if the sum of three plus two is five and the sum of four plus one is five, then the missing symbol must be equal to. Three plus two is equal to four plus one. Both sums have a total of five. The correct symbol to compare the sums is the equal to symbol because three plus two is equal to four plus one.

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