Understand subtraction as an unknown-addend problem. 1.OA.4 For example, subtract 10 8 by finding the number that – makes 10 when added to 8 Learning Targets: I can: subtraction problems by finding the missing addend Relate counting to addition and subtraction (e.g., by 1.OA.5 counting on 2 to add 2). Learning Target: I can: Count on to add Count back to subtract 1.OA.6 Add and subtract within 20, demonstrating fluency for KCAS Note: 1.OA.6- In order to meet this standard, students addition and subtraction within 10. Use strategies such as should record their strategies and use an equation to counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); represent their work. 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). Learning Target: I can: Find the unknown number in any position in a multiplication or division equation
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 Learning Targets: I can: subtraction problems by finding the missing addend 1.OA.5 Relate counting to addition and subtraction (e.g., by counting on 2 to add 2). Learning Target: I can: Count on to add Count back to subtract 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). Learning Target: I can: Find the unknown number in any position in a multiplication or division equation KCAS Note: 1.OA.6- In order to meet this standard, students should record their strategies and use an equation to represent their work.
1st%20grade%20Math%20Curriuclum%20Guide%20-Revised%202012-2013-R.docx