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 […]
Tri-Fractional Operations: How to Add and Subtract Three Fractions with Different Denominators
TL;DR: Three fractions, three different denominators — it sounds like more work, but the playbook is the same as for two. Find one common denominator that fits all three, rewrite each fraction with it, then combine the numerators from left to right. Simplify at the end. The only new step is making sure your common […]
