In this Grade 4 lesson from Pengi Math Chapter 3, students learn to model multiplicative comparison problems using tape diagrams, bar models, and equations. They practice distinguishing multiplicative comparison from additive comparison and apply multiplication and division to solve real comparison problems.
Section 1
Identifying Additive and Multiplicative Comparisons
An additive comparison shows how much more or less one quantity is than another. It involves adding a difference to a smaller quantity to find a larger quantity.
A multiplicative comparison shows how many times as many one quantity is than another. It involves multiplying a smaller quantity by a factor to find a larger quantity.
Section 2
Writing Equations for Multiplicative Comparisons
A multiplicative comparison can be represented by the equation:
If we let be the larger quantity, be the smaller quantity, and be the multiplier, the general form is .
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Section 1
Identifying Additive and Multiplicative Comparisons
An additive comparison shows how much more or less one quantity is than another. It involves adding a difference to a smaller quantity to find a larger quantity.
A multiplicative comparison shows how many times as many one quantity is than another. It involves multiplying a smaller quantity by a factor to find a larger quantity.
Section 2
Writing Equations for Multiplicative Comparisons
A multiplicative comparison can be represented by the equation:
If we let be the larger quantity, be the smaller quantity, and be the multiplier, the general form is .
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter