Multiplication and Division Facts to 100
Warm-up
Doubling chain: start at 3. Double: 6. Double: 12. Double: 24. Double: 48. Double: 96. So 3 x 32 = 96. Try: start at 7. Double to get 7x8. (7, 14, 28, 56: so 7x8=56.) This warm-up builds doubling fluency and connects it to multiplication.
Explore
Strategy showdown: each student receives 5 hard facts. They must solve each with two different strategies, compare which is faster, and present both to a partner. Class discussion: which strategies are most broadly useful?
Consolidate
Practice
Students complete 30 facts timed at their own pace (target: no fact over 5 seconds), apply double-double to 8 multi-digit multiplications. Exit ticket: 28 x 4 using double-double.
Exit ticket
Students complete 30 facts timed at their own pace (target: no fact over 5 seconds), apply double-double to 8 multi-digit multiplications. Exit ticket: 28 x 4 using double-double.
Double 37=74. Double 74=148. So 37x4=148.
Think: 8x?=96. Start: 8x1=8. Double: 8x2=16. Double: 8x4=32. Double: 8x8=64. Double: 8x16=128 (too much). So between 8x8=64 and 8x16=128. 8x12=8x8+8x4=64+32=96. So 96/8=12.