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Common Core Standards
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Common Core and TEKS aligned.

Common Core:
1.OA.B.3 Apply properties of operations as strategies to add and subtract.
1.OA.B.4 Understand subtraction as an unknown-addend problem.
1.OA.D.7 Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false.
1.OA.D.8 Determine the unknown whole number in an addition or subtraction equation relating three whole numbers.
1.NBT.C.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.

TEKS
1.3A use concrete and pictorial models to determine the sum of a multiple of 10 and a one-digit number in problems up to 99;
1.5E understand that the equal sign represents a relationship where expressions on each side of the equal sign represent the same value(s);
1.5F determine the unknown whole number in an addition or subtraction equation when the unknown may be any one of the three or four terms in the equation;
1.3C compose 10 with two or more addends with and without concrete objects;
1.5G apply properties of operations to add and subtract two or three numbers.
Total Pages
46 pages
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