Addition and Subtraction Basic Facts Strategies Lesson 2.1: Overview Of This Unit

What are "basic facts"?

1. Which of the following are considered basic addition and subtraction facts?

a. 3+8=11
b. 16+2=18
c. 4+2=6
d. 15+12=27
e. 9-3=6
f. 12-3=9
g. 15-7=8
h. 15-2=13
i. 19-5=14
j. 25-12=13

What strategies will we be looking at?

2. Is counting all considered a counting strategy?

3. In what order do children typically learn/figure out these ways of adding and subtracting numbers.

a. memorizing some facts and deriving other facts from the ones they have memorized
b. direct modeling
c. counting on and counting back
d. memorizing all of the facts.

What are our sources of information?

4. Why are we using the Thinking With Numbers question and answer site as our primary text?

5. Why should we care about basic facts?

Answers