# Make Ten to Subtract (2.OA.2, 1.OA.6)

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108 KB|17 pages
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Product Description
Suggested grade level: 1st and 2nd
Includes center sign 28 Make 10 to Subtract puzzle cards and a matching worksheet.
Children match the number sentence, picture and the difference.
This center correlates with Envision Math First and Second Grade concepts.
Other series also cover this subtraction strategy.
This is the 2012-2013 Second Grade Math center for the month of November.
It is also available to non members.
Graphics used with permission of Thistle Girl Designs.

COMMON CORE STANDARD

Operations and Algebraic Thinking Standards
2.OA.2. Fluently add and subtract within 20 using mental
strategies. By end of Grade 2, know from memory all sums of
two one-digit numbers

Operations and Algebraic Thinking Standards
1.OA.6. Add and subtract within 20, demonstrating fluency
for addition and subtraction within 10. Use strategies such as
counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 =
14); decomposing a number leading to a ten (e.g., 13 – 4 = 13
– 3 – 1 = 10 – 1 = 9); using the relationship between addition
and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12
– 8 = 4); and creating equivalent but easier or known sums
(e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).
Total Pages
17 pages
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