CalcMonkey › Kids math games › Number line
In Number Line Hop above, your monkey hops along a number line: forward to add, backward to subtract. Choose 1st grade to add and subtract within 20, or 6th grade to hop past zero and work with negative numbers.
1st grade: add and subtract within 20. 6th grade: negative numbers.
Play ▶Quick facts practice once hopping feels easy.
Play ▶5th–6th grade: longer expressions, one step at a time.
Play ▶These games line up with these Common Core State Standards for Mathematics:
It turns adding and subtracting into movement kids can see — forward and backward — and later makes negative numbers, fractions and decimals easier to picture.
Adding a negative number moves you to the left. For example, 4 + (−6) starts at 4 and moves 6 to the left, landing on −2.