Estimation resources

In this practical task, students work in pairs to estimate how much time they think has passed. One student estimates while the other times.

Students estimate a multiplication problem, share their methods, discuss the rounding method, and then do more estimation problems using rounding.

Students explain multiplication estimation methods used to solve word problems.

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.

Students estimate an addition problem, share their methods, discuss the averaging method, and then do more problems using averaging.

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 an addition problem, share their methods, discuss grouping nice numbers, and then do a problem using this method, then design a question showing how it uses the method.

Students estimate an addition problem, share their methods, discuss the rounding method, and then do more problems using rounding.

In this practical task, students estimate the capacity of two different sized containers, then check their estimates with a measuring jug.

In this practical task, students estimate the length of two common classroom objects, then check their estimates with a ruler.

In this practical task, students estimate, and then measure, the weight of two objects using a number of multi-link cubes, a balance scale and weights.

In this practical task, students estimate, then measure, the weight of two bags using kitchen scales.

In this practical task, students estimate, then measure, the length of two objects using a ruler.

In this practical task, students first estimate, then measure, how many 500ml jars it takes to fill a 1 litre and a 3 litre container

Students write down an explanation of how the front-end estimation strategy works in addition problems to give information on their understanding of the strategy.

Students discuss making an initial estimate in addition problems using the front-end method followed by compensation to get a more accurate estimate. They then use this method on two addition problems.

In this practical task, students estimate, then measure, the volume of two containers using a measuring jug.

In this practical task, students estimate the weight of two different sized bags, then check their estimates using kitchen scales.

Students estimate an addition problem, share their methods, discuss the front-end method and then do more problems using front-end.

Students estimate and explain how they estimated their answer for two number problems: one involving multiplication; and the other division.

Students estimate the amount of liquid in four different glasses based on the amount given that is in a fifth glass.

Students estimate a subtraction problem, share their methods, discuss the rounding one number method, and then do more problems by rounding one number.

Students explain subtraction estimation methods used to solve a word problem.

In this practical task, students estimate and then measure how far they can jump.

This practical task requires students to lift a 1 kg weight and then estimate whether a range of everyday objects weigh less than, about the same as, or more than 1 kilogram.