Additive thinking resources

Students use a number line to show how to solve whole number addition and subtraction problems.

Students add up amounts of money including dollars and cents.

Students use all four operations to perform calculations using decimal values.

Students add fractions with different denominators.

Students find the perimeters for range of different 4-sided polygons.

Students convert units of weight - grams and kilograms - to answer questions a range of food items.

Students calculate the perimeter of a range of 2-dimensional shapes.

Students find the biggest and smallest numbers from a list of positive and negative numbers. They add, subtract and multiply using these numbers.

Students calculate the changes to an account balance after two withdrawals and a deposit.

Students answer questions involving adding and subtracting fractions of food.

Students conduct a practical, statistical investigation. They decide on a Topic and question, conduct the survey, complete the tally chart, construct a bar graph of the major ideas and make statements about the results.

Students find the sum of a number of given decimal weights of objects or the post.

Students estimate the sum of a number of fractions.

Students add and subtract fractions to work out fractions of food.

Students answer questions involving adding and subtracting fractions of cake.

This task requires students to estimate some addition problems using any appropriate method.

In this task students decide which people are estimating and which are not, and explain their reasoning.

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

Students identify fractions that are greater than a half, explain their reasoning, and identify how far from half some fractions are.

Students identify fractions that are greater than one, explain their reasoning and identify how far from one some fractions are.

Students to show how they estimate in some addition problems.

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

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

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.

This practical task involves students making best estimates of sets of items and clearly demonstrating their method(s) of estimation.