Matholia educational maths video on subtraction within 20 with 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 Subtraction to 10 module, this module provides further experiences with concretely subtracting tens from ones, then connects that proficiency with the more abstract standard algorithm for subtraction with and without regrouping. Word problems are represented with the bar model for the first time here.

Learning Targets:
• I can count between 10 and 20 objects.
• I can draw models of numbers between 10 and 20 as a ten and some ones.
• I can solve subtraction expressions and equations to 20
• I can subtract two 1-digit numbers or a 2-digit number and a 1-digit number using column subtraction.
• I can subtract with and without regrouping using column subtraction.
• I can solve subtraction word problems to 20.

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

For more maths videos for kids and loads of interactive content, visit www.matholia.com.

This video lesson is taken from Matholia.com – a world-class online learning resource for K-6 mathematics. Our international curriculum covers a comprehensive range of topics and concepts using the Singapore's teaching approach. Concepts are presented through Concrete, Pictorial, Abstract (CPA) approach. Resources available include dynamic practice, instructional videos, ebooks, interactive tools and progress tracking and recording – all adopting the Singapore pedagogy.

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