Unit 2 Contents

5. Solve each pair of related facts. Name two other facts in the same fact family.
1. 5 2 = ? and 2 5 =?
2. 10 3 = ? and 3 10 = ?
3. 10 5 = ? and 50 ÷ 10 = ?
4. 6 5 = ? and 30 ÷ 5 = ?
6. For each related fact, write the complete number sentence.
1. 8 5 ÷ ________
   
   ________ ÷ 5 = ________
   
   ________ ÷ 8 = ________
   
   5 ________ = ________
2. 7 10 + ________
   
   ________ ÷ ________ = 7
   
   ________ ÷ 7 = ________
   
   10 ________ = ________
3. 90 ÷ ________ = 9
   
   ________ 10 = ________
   
   ________ ÷ 9 = ________
   
   ________ 9 = ________
   
   
4. 5 ________ = 45
   
   45 ÷ ________ = ________
   
   9 ________ = ________
   
   45 ÷ ________ = ________
   
   
7. What is 5 5? Name a related fact for 5 5. Is there more than one?
8. What is 10 10? Name a related fact for 10 10. Is there more than one?
9. The numbers 25 and 100 are square numbers. How are the fact families for the square numbers different from other fact families?
10. Solve the given fact. Then name other facts in the same fact family.
1. 10 6 = ?
2. 20 ÷ 10 = ?
3. 7 5 = ?
4. 80 ÷ 8 = ?
5. 15 ÷ 3 = ?
6. 4 10 = ?
7. 3 5 = ?
8. 10 ÷ 2 = ?

Division Facts and Triangle Flash Cards

With a partner, use the directions and your Triangle Flash Cards: 5s and 10s to practice the division facts.

• One partner covers the number in the square. This number will be the quotient—the answer to a division problem. The number in the circle is the divisor.
• The second person solves a division fact with the two uncovered numbers as shown.