Number bonds to 20

Missing-part cards for bonds to 20. Use as a warm-up or exit ticket.

Outcomes

• Recall pairs that make 20
• Explain a pair using tens and ones

Materials

• Bond cards
• Counters if needed

Steps

1. Show 20 as two tens.
2. Flash a card. Students write the missing part on a mini whiteboard.
3. Check as a class. Build one pair with counters.
4. Play a two-minute speed round.