Cogito
Grade 3 Math · Chapter 3 · Lesson 7
Missing Factors and Divisors
Finding the gap in any position.
10 problems · about 13 minutes · 3.OA.A.4
NameDate
Figure — use these to answer the problems
42
6
7
- 6 × 7 = 42
First factor
Second factor
Warm-Up Review
From earlier lessons. Loosen up before the new work.
2 problemsFrom “Multiplying by Multiples of Ten”
7 × 40 = ?
AnswerFrom “The Associative Property”
2 × 5 × 6 = ?
Answer
Warm Up
Straightforward practice. Get the method working first.
4 problems7 × ? = 63
Answer? ÷ 5 = 7. What is the missing number?
Answer8 × ? = 56
Answer? ÷ 6 = 8
Answer
Build It Up
The same ideas with more to keep track of.
2 problems45 ÷ ? = 5
Answer? × 9 = 72
Answer
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
2 problemsThe Missing Factor
6 × ? = 42. What is the missing factor?
AnswerThe Missing Divisor
36 ÷ ? = 9. What is the missing number?
Answer