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Standard 3.N.9 - Practice solving addition sentences with two and three digit numbers ending in zero 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.

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