Mission 81 — Counting to 100

In this lesson, you practice counting forward and backward between 0 and 100. You use a hundred chart and a number line to see how numbers go in order.

Counting forward (up)

• When you count forward, the numbers get bigger.
• You say: 37, 38, 39, 40, 41, 42…
• On a number line, you move to the right.

Counting backward (down)

• When you count backward, the numbers get smaller.
• You say: 42, 41, 40, 39, 38, 37…
• On a number line, you move to the left.

Hundred chart and tens lines

• A hundred chart shows numbers from 1 to 100 in rows of 10.
• Going across a row, you count forward by ones.
• Going down a column, you jump forward by tens (10, 20, 30, 40…).

When you practice, always say the numbers out loud and point carefully so you do not skip or repeat any number.