Math Unit Test: Friday Dec 11

Grade 3 Addition and Subtraction Study Guide

Test Date: Friday, December 11th, 2015

- 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)

-Estimating sums and differences (23+52= ___  → 23 is rounded to 20 and 52 is rounded to 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 different strategies for solving a problem

a) Addition Strategies; Doubles, Near Doubles (if 6+6=12, then 6+7=13 because 7 is one more than 6), Make 10, Fact Families,

b) Subtraction Strategies : Make 10, Counting back, Fact families

- Problem solving (Underline important parts of the question, show all of your thinking clearly and include an answer sentence)