Rotten Teeth
no_teeth.docx | |
File Size: | 1107 kb |
File Type: | docx |
Big ideas
Using derived facts.
10x 5 gives the same answer as 5x10 (commutative property, i.e., changing the order of factors) distributive property, i.e., splitting the factors, 5x12 is the same as 5x10 +5x2. |
Support/PromptsWhat are 10 5's?
What 10x do you know? What 5x do you know? Which is easier? Draw it out (as an array?) What different times tables can you see there? This will come from modelling by the students who can already do it initially. Can also draw it out of the discussions around arrays and pictures of thinking. |
Hope the students are able to do:
Also plan to teach open arrays as a way of recording multiplicative thinking.
Sequenced Student Work
We did do a stage 5 one but I have lost it sorry.
Here is the stage 6 one where a group was able to use an open array (but it was just copying me really).
Here is the stage 6 one where a group was able to use an open array (but it was just copying me really).