Common Denominator Lab

Learning goal

See why unlike fractions need equal-sized parts before we add them.

First fraction

1/2

Numerator1 Denominator2

1/3

Numerator1 Denominator3

Try an example

Equivalent fraction bars

Sum on a number line

What changed?

Check understanding

0 streak

Numerator Denominator

Equivalent answers are welcome — simplified or not.

Teaching tips

Keyboard: focus any slider, then use the arrow keys.