Grade 3 - Number
Standard 3.N.9 - Practice solving addition sentences to make a specific number up to 100.
Included Skills: Addition, Number Properties
Demonstrate an understanding of addition and subtraction of numbers with answers to 1000 (limited to 1-, 2- and 3-digit numerals), concretely, pictorially and symbolically, by: • using personal strategies for adding and subtracting with and without the support of manipulatives. • creating and solving problems in context that involve addition and subtraction of numbers. • Model the addition of two or more given numbers, using concrete or visual representations, and record the process symbolically. • Model the subtraction of two given numbers, using concrete or visual representations, and record the process symbolically. • Create an addition or subtraction story problem for a given solution. • Determine the sum of two given numbers, using a personal strategy; e.g., for 326 + 48, record 300 + 60 + 14. • Determine the difference of two given numbers, using a personal strategy; e.g., for 127 – 38, record 38 + 2 + 80 + 7 or 127 – 20 – 10 – 8. • Refine personal strategies to increase their efficiency. • Solve a given problem involving the sum or difference of two given numbers. • Solve a given problem using the standard/traditional addition algorithm. • Solve a given problem using the standard/traditional subtraction algorithm.