This worksheet asks students to mark Sam’s work. He has solved 6 written, vertical subtraction problems involving regrouping. If the problems are incorrect, students need to help Sam get the right answers. It is part of a larger unit of work on Subtraction with Regrouping- Year 3.
Add and subtract one- and two-digit numbers, representing problems using number sentences and solve using part-part-whole reasoning and a variety of calculation strategies
Add and subtract two- and three-digit numbers using place value to partition, rearrange and regroup numbers to assist in calculations without a calculator
Solve simple addition and subtraction problems using a range of efficient mental and written strategies
Recognise and explain the connection between addition and subtraction
Solve problems by using number sentences for addition or subtraction
Apply place value to partition, rearrange and regroup numbers to at least 10 000 to assist calculations and solve problems
Uses a range of strategies and informal recording methods for addition and subtraction involving one- and two-digit numbers
Describes mathematical situations and methods using everyday and some mathematical language, actions, materials, diagrams and symbols
Uses objects, diagrams and technology to explore mathematical problems
Supports conclusions by explaining or demonstrating how answers were obtained
Creates, represents and continues a variety of patterns with numbers and objects
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
Applies place value to order, read and represent numbers of up to five digits
Uses number bonds and the relationship between addition and subtraction to solve problems involving partitioning
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