Visualizing Multiplication: How to Use Arrays to Multiply Fractions by Whole Numbers
TL;DR: Think of an array as equal groups lined up in a grid. To multiply a fraction by a whole number with an array, you draw that many copies of the same fraction shape side by side and count up all the shaded parts. Four times two-thirds becomes four little shapes, each with two of […]
Stretching the Line: How to Multiply Fractions by Whole Numbers with Number Lines
TL;DR: Turn fraction-times-whole-number into a road trip on a number line. Each jump is the size of your fraction, and the whole number tells you how many jumps to take starting from 0. For four times one-third, draw four hops of one-third, landing at four-thirds, which is one and one-third. Where you stop is the […]
