Subtraction Within 50 Without Regrouping – Base-10 Blocks and Place Value Chart

Matholia educational maths video on subtraction within 50 without regrouping. Base-10 blocks and a place value chart to give students a visual representation by making groups.
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Topic Description:
Building upon the foundational work done with the previous subtraction modules, this module provides further experiences with concretely subtracting tens and ones, then connects that proficiency with the more abstract standard algorithm for subtraction with and without regrouping. Word problems continue to be modeled using bar diagrams.

Learning Targets:
• I can draw or build models of numbers between 20 and 50 as a ten and some ones.
• I can solve subtraction expressions and equations to 50.
• I can subtract two 2-digit numbers number using column subtraction with or without regrouping.

• I can model and solve word problems.

Suggested Classroom Resources
• Multi-link Cubes
• Base-10 blocks
• Place value mats showing tens and ones columns
• The 100 square
• Ten frames
• Numeral cards
• Simple dice games
• Number lines
• Pan balance
• Number balance