Grade 3 Addition and Subtraction Study Guide
Date: Thursday, November 22nd 2018
- Rounding 2- and 3-digit numbers (i.e. Rounding 139 to the nearest ten is 140)
- Comparing Numbers (e.g., I know 83 is greater than 73 because 83 has 8 tens and
73 has 7 tens)
73 has 7 tens)
-Estimating sums and differences (23+52= ___ → 23 is rounded to 20 and 52 is rounded to
50, 20+50= 70)
50, 20+50= 70)
- Adding and subtracting involving 3-digit numbers (i.e. 123+546, 177-58, etc.)
using a variety of strategies (including standard addition/subtraction)
using a variety of strategies (including standard addition/subtraction)
- Using different strategies for solving a problem
- Find a missing number (i.e. 12- __=3)
- Problem-solving (Underline important parts of the question, show all of your
thinking clearly and include an answer sentence)
thinking clearly and include an answer sentence)
*Students can pick and choose any addition and subtraction strategies.
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