Thinking unknown addend when added to 8. Add need to find the 1 Standard 4 problem and subtract within 20. number to add to 8 in (1.OA.4) order to arrive at 10. Operations Relate counting to Addition is just Ask your child to count and Algebraic addition and counting on (or on a number to Thinking subtraction (e.g. by counting up 2 is adding another number to Grade 1 counting on 2 to add 2) arrive at the answer, Standard 5 2) which is called the (1.OA.5) sum. For example, counting up 4 is adding 4, and subtracting 4 is counting down 4 Operations Add and subtract Fluency means speed Ask your child to add and Algebraic within 20, and accuracy when or subtract two Thinking demonstrating doing the addition and numbers that you give Grade 1 fluency for addition subtraction. them orally and/or on Standard 6 and subtraction Students need a variety paper. See if they can (1.OA.6) within 10. Use of strategies for solving better their score the strategies such as addition and next time. Have them counting on; making subtraction problems use different strategies ten; decomposing a through 20. Students such as counting on, or number leading to a also need to be fluent making ten. Different ten (e.g. with any sums or strategies are just using the differences within 10. different ways to get relationship These strategies will the same answer. You between addition provide students with can help your child by and subtraction (e.g. a variety of choices also reviewing knowing that when deciding the best and their “doubles” 8+4=12, one knows way to solve problems. sums 12-8=4) and This standard brings 1+1, 2+2, 4+4, 5+5, etc. creating equivalent together all of the but easier or known previous strategies and sums (e.g. adding operations to apply in 6+7 by creating the any given addition or known equivalent subtraction situation. 6+6+1=12+1=13 Fluency within 10 allows sums and differences within 20 to be solved quickly, as
Thinking 1 Standard 4 (1.OA.4) unknown addend problem when added to 8. Add and subtract within 20. need to find the number to add to 8 in order to arrive at 10. Operations and Algebraic Thinking Grade 1 Standard 5 (1.OA.5) Relate counting to addition and subtraction (e.g. by counting on 2 to add 2) Addition is just counting on (or counting up 2 is adding 2) Ask your child to count on a number to another number to arrive at the answer, which is called the sum. For example, counting up 4 is adding 4, and subtracting 4 is counting down 4 Operations and Algebraic Thinking Grade 1 Standard 6 (1.OA.6) Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten; decomposing a number leading to a ten (e.g. 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 Fluency means speed and accuracy when doing the addition and subtraction. Students need a variety of strategies for solving addition and subtraction problems through 20. Students also need to be fluent with any sums or differences within 10. These strategies will provide students with a variety of choices when deciding the best way to solve problems. This standard brings together all of the previous strategies and operations to apply in any given addition or subtraction situation. Fluency within 10 allows sums and differences within 20 to be solved quickly, as Ask your child to add or subtract two numbers that you give them orally and/or on paper. See if they can better their score the next time. Have them use different strategies such as counting on, or making ten. Different strategies are just different ways to get the same answer. You can help your child by also reviewing “doubles” and their sums 1+1, 2+2, 4+4, 5+5, etc.