Unit 1:
Unit Goals:
• Count a set of up to 20 objects.
• Compare and order quantities to 12.
• Combine two small quantities.
• Interpret (retell the action and sequence) and solve addition story problems.
• Find more than one combination of two addends for a number up to 10 (e.g., 7 is 4 and 3 and also 5 and 2).
1.OA.1. Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
1.OA.3. Apply properties of operations as strategies to add and subtract.2 Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.)
1.OA.4. Understand subtraction as an unknown-addend problem. For example, subtract 10 – 8 by finding the number that makes 10 when added to 8. Add and subtract within 20.
1.NBT.3 Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.
Extend the counting sequence. 1.NBT.1
Develop place value understanding. 1.NBT.2, 1.NBT.3
Solve addition and subtraction word problems. 1.OA.2
Develop addition and subtraction skills. 1.OA.5, 1.OA.6
Work with addition and subtraction equations. 1.OA.7, 1.OA.8
Unit Goals:
• Count a set of up to 20 objects.
• Compare and order quantities to 12.
• Combine two small quantities.
• Interpret (retell the action and sequence) and solve addition story problems.
• Find more than one combination of two addends for a number up to 10 (e.g., 7 is 4 and 3 and also 5 and 2).
1.OA.1. Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
1.OA.3. Apply properties of operations as strategies to add and subtract.2 Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.)
1.OA.4. Understand subtraction as an unknown-addend problem. For example, subtract 10 – 8 by finding the number that makes 10 when added to 8. Add and subtract within 20.
1.NBT.3 Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.
Extend the counting sequence. 1.NBT.1
Develop place value understanding. 1.NBT.2, 1.NBT.3
Solve addition and subtraction word problems. 1.OA.2
Develop addition and subtraction skills. 1.OA.5, 1.OA.6
Work with addition and subtraction equations. 1.OA.7, 1.OA.8