Subtract within 10 1-13
Use number bonds and ten frames to subtract and find the unknown part. What's 9-3? Visualize 9 on a ten frame – a full top row and 4 more. Mentally cross off 3. There is 1 left. How many in all? 6, so 9-3 = 6. Check for accuracy by drawing counters. Encourage students to check their own thinking – metacognition.
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