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Cogito

Grade 1 Math · Chapter 3 · Lesson 6

Practice Worksheet

Fact Families

Three numbers make four sentences.

10 problems · about 12 minutes · 1.OA.B.4, 1.OA.C.6

NameDate

Figure — use these to answer the problems

Change either part. Watch all four sentences change together.

7

2

5

2 + 5 = 7
5 + 2 = 7
7 − 2 = 5
7 − 5 = 2

First part2

Second part5

Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

7 problems

From “What Changed?”
9 − ? = 6
Answer
From “The Hidden Part”
Whole 9, one part 4. What is the other part?
Answer
From “Taking Away”
7 − 3 = ?
Answer
From “Counting Up To Subtract”
9 − 7 = ?
Answer
From “How Many More To Make It?”
3 + ? = 7
Answer
From “Facts to Ten”
7 + 3 = ?
Answer
From “Doubles and One More”
3 + 4 = ?
Answer

Warm Up

Straightforward practice. Get the method working first.

2 problems

You know 4 + 5 = 9. What is 9 − 4?
Answer
9
How many different sentences does 4 and 4 make?
- Two.
- Four.

Stretch Yourself

Mixed problems. Work out what kind of question it is before you start.

1 problem

Using What You Know
You know 6 + 3 = 9. What is 9 − 6?
Answer