Students find the number of groups of a given size using division, reverse multiplication, trial and improvement, or iterative equal sharing. Students must show their working.
Students estimate a division problem, share their methods, discuss the nice numbers and factors method, and then do more problems using nice numbers and factors.
Task: Match vocabulary and definitions, and select why these terms are useful to know when thinking about butterflies at risk. Assessment focus: understanding science texts.
Students discuss making an interval estimate in multiplication problems (i.e., getting a lower and an upper limit for the actual answer using the front-end and rounding-up estimation methods). They then use this method on two problems.
Students estimate a subtraction problem, share their methods, discuss the rounding one number method, and then do more problems by rounding one number.