M2.3.7 For the adult
Remainders
I have 17 stones. I make groups of 5. What about the extra stones?
What this chapter teaches
A remainder is what is left when things do not share out evenly. What to do with it depends on the story: round up if the rest still need a place, round down if only full groups count.
Three questions to ask
There is no one right wording. Listen for the idea.
- How many are left over when you put 20 stones in groups of 6, and how do you know?
- When would you round an answer up, and when would you round it down?
- Why must a remainder always be smaller than the size of a group?
After the chapter, the learner can
- Share 17 into groups of 5 and say what is left over
- Decide whether to round up or down in a story
What they copy into their notebook
The remainder is what is left over. Groups times size, plus remainder, gives the start. 17 ÷ 5 = 3, remainder 2. In a story, round up if the rest need a place.