This worksheet has been created as part of our Problem Solving with Money unit for Year 4. It encourages students to understand apply the effect of rounding when adding money amounts; rounding both numbers up, both numbers down and one number up and one number down. Then, students complete the reflection statement, justifying which is the best approximation and why. We have also created an answer key for your convenience.
Choose and use estimation and rounding to check and explain the reasonableness of calculations including the results of financial transactions
Use mathematical modelling to solve practical problems involving additive and multiplicative situations including financial contexts; formulate the problems using number sentences and choose efficient calculation strategies, using digital tools where appropriate; interpret and communicate solutions in terms of the situation
Use estimation and rounding to check the reasonableness of answers to calculations
Develop efficient mental and written strategies and use appropriate digital technologies for multiplication and for division where there is no remainder
Solve problems involving purchases and the calculation of change to the nearest five cents with and without digital technologies
Solve word problems by using number sentences involving multiplication or division where there is no remainder
Solve problems involving purchases and the calculation of change to the nearest 5 cents with and without digital tools
Use estimation and rounding to check the reasonableness of answers to calculations
Develop efficient mental and written strategies and use appropriate digital technologies for multiplication and for division where there is no remainder
Solve problems involving purchases and the calculation of change to the nearest five cents with and without digital technologies
Solve word problems by using number sentences involving multiplication or division where there is no remainder
Describes and represents mathematical situations in a variety of ways using mathematical terminology and some conventions
Selects and applies appropriate problem- solving strategies, including the use of digital technologies, in undertaking investigations
Gives a valid reason for supporting one possible solution over another
Selects and applies appropriate strategies for addition and subtraction with counting numbers of any size
Uses appropriate terminology to describe, and symbols to represent, mathematical ideas
Selects and uses appropriate mental or written strategies, or technology, to solve problems
Checks the accuracy of a statement and explains the reasoning used
Uses mental and written strategies for addition and subtraction involving two-, three-, four- and five-digit numbers
Uses mental and informal written strategies for multiplication and division
Generalises properties of odd and even numbers, generates number patterns, and completes simple number sentences by calculating missing values
Applies an understanding of place value and the role of zero to represent numbers to at least tens of thousands
Represents and compares decimals up to 2 decimal places using place value
Selects and uses mental and written strategies for addition and subtraction involving 2- and 3-digit numbers
Completes number sentences involving addition and subtraction by finding missing values
Represents and uses the structure of multiplicative relations to 10 × 10 to solve problems
Completes number sentences involving multiplication and division by finding missing values