Jump back

Summary

A game that practices counting backward by 10s within 100 using the 100 chart.

Curriculum content

• Count back in tens from any number

Materials

Card sets

• 1 set of Mathletics number cards 0 to 9 0-9

Concrete

• 20 counters

Printables

• 100 chart Download 100 chart - USL Download 100 chart - Tabloid

How to play

Set-up

1. Arrange students into pairs.
2. Shuffle or mix up the cards and place them face down in a pile.
3. Give each pair a hundred chart and a pile of 20 counters.

Rules

1. Player 1 selects 2 number cards and uses them to make the largest possible 2-digit number. This is the starting number. Place a counter on the starting number.
2. Players take turns to count backward in 10s from the starting number and place a counter on each number.
3. Players count out loud together the number pattern that they have created.
4. The player who puts the last counter down receives 1 counter.
5. Clear the board and play again with the other player selecting the starting number.
6. The winner is the first player to collect 5 counters.

Variations

CHANGE it down

• Ask students to count backward in 2s using a 0 to 30 number line.

CHANGE it up

• Ask students to count in 5s.
• Students write number sentences to record each calculation they make.
• Play ‘Jump up’.
• Ask students to predict who will win before they start counting based on the starting number.

What to look for

• Are students confident counting backward in 10s?
• Are they using the 100 chart to support them?
• Were students able to make predictions about who would win by identifying counting patterns and the effect of odd or even 10s?