Summary
A game that practises counting backwards 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
Printables
How to play
Set up
- Arrange students into pairs.
- Shuffle or mix up the cards and place them face down in a pile.
- Give each pair a hundred chart and a pile of 20 counters.
Rules
- 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.
- Players take turns to count backwards in 10s from the starting number and place a counter on each number.
- Players count out loud together the number pattern that they have created.
- The player who puts the last counter down receives 1 counter.
- Clear the board and play again with the other player selecting the starting number.
- The winner is the first player to collect 5 counters.
Variations
CHANGE it down
- Ask students to count backwards 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 backwards 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?