M2.3.6 For the adult
Times and divide facts together
I know 3 × 7 = 21. Does that help me with 21 ÷ 3?
What this chapter teaches
Three numbers make four facts: two times and two divide. Times can swap places and divide cannot. To answer a divide question, ask what times the divider makes the number.
Three questions to ask
There is no one right wording. Listen for the idea.
- Which four facts can you make from 3, 7 and 21?
- How can a times fact help you answer 42 ÷ 6?
- Why can times swap places but divide cannot?
After the chapter, the learner can
- Write the four facts that link 3, 7 and 21
- Use a times fact to answer a divide question
- Show that 6 × 4 and 4 × 6 give the same answer
What they copy into their notebook
Three numbers make four facts. 3 × 7 = 21, 7 × 3 = 21, 21 ÷ 3 = 7, 21 ÷ 7 = 3. Times can swap. Divide cannot.