Texas Math Models

Try “number line” or “4.5D”

Benchmark check · 0, ½, 1

3/5 + 4/5 = 1 2/5 Grade 4

before you compute: about where should it land? 01 141234 3545 three fifths is a little more than a half · four fifths is nearly 1 so it must land between1and112 125fits ✓

How this one works

How

ask if each fraction is near 0, near 1/2 or near 1, then add those.

Best when

you want to know your answer is sensible before and after you solve.

The same problem, other ways