Two-Digit Addition/Subtraction Card Sort Activities-Number Discs like Singapore

Ms. K
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PDF (987 KB|38 pages)
Standards
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Ms. K
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Description

These card sorts were designed for students to use after experiences solving addition and subtraction equations with number discs like Singapore math. For the card sorts to be most effective, allow students to work in pairs to solve them. This creates discussion which will provide an environment for evaluation one of Bloom's higher levels of thinking. In each card sort, there is an extra card which is meant to create more discussion among student pairs. The extra card may look like the match to another card. This was done in order to target discussion around some misconceptions students may develop with addition and subtraction.

Each card sort is four pages long. The first two pages are the cards for the students to cut out. The second two pages are for students to glue their cards onto.

Page 1 Title Page

Page 2 Teacher Notes

Pages 3-6 Addition card sort with no regrouping matching the picture to the equation

Pages 7-10 Addition card sort with regrouping matching the picture to the equation

Pages 11-14 Addition card sort with word problems (both regrouping and no regrouping included)matching the picture that solves the problem

Pages 15-18 Subtraction card sort with no regrouping matching the picture to the equation

Pages 19-22 Subtraction card sort with regrouping matching the picture to the equation

Pages 23-26 Subtraction card sort with word problems (both regrouping and no regrouping)matching the picture that solves the problem

Pages 27-30 Addition and Subtraction mixed (both regrouping and no regrouping)matching the picture to the equation

Pages 31-34 Addition and Subtraction with word problems (both regrouping and no regrouping)matching the picture that solves the problem

Pages 35-38 Answer Keys

All of these sorts are adding and subtracting within 100 in accordance with common core standards:

1.NBT.4 Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

2.NBT.5 Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

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Total Pages
38 pages
Answer Key
Included
Teaching Duration
2 Weeks
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Standards

to see state-specific standards (only available in the US).
Explain why addition and subtraction strategies work, using place value and the properties of operations.
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

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