Math Games

Grade 3 - Number

Standard 3.N.9 - Practice solving subtraction sentences up to 1000.

Included Skills:

Demonstrate an understanding of addition and subtraction of numbers with answers to 1000 (limited to 1, 2 and 3-digit numerals) by:
• using personal strategies for adding and subtracting with and without the support of manipulatives
• creating and solving problems in contexts that involve addition and subtraction of numbers concretely, pictorially and symbolically.

• Achievement Indicators
• Students who have achieved this outcome(s) should be able to:
- 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.
- Solve a given problem involving the sum or difference of two given numbers.