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Operations and Algebraic Thinking • 3.OA.4 and 3.OA.6 GRADE 3 • NC DEPARTMENT OF PUBLIC INSTRUCTION
Find the Unknown Number
Building Fluency: unders tand division as an unknown factor problem
Materials: a recording sheet for each player, unknown number game cards
Number of Players: 2
Directions:
1. Spread out the missing number game cards.
2. Players take turns pick ing a card and telling the unknown number.
3. The player keeps all cards correctly answered & writes the equation as both a multiplication & division equation on their recording sheet.
Example: 4 x 7 = 28; 28 ÷ 4 = 7
4. If the player answers incorrectly, the card is placed back in the pile.
5. Play until all cards are picked and the player wi th the mos t cards wins.
Variat ion/Ex tension: W hen a player misses a question, the other player may answer correctly and keep the card. This game could be
played by an indiv idual just picking and recording equat ions. A multiplication chart may be needed to solve any disagreements.
PLAYER 1 PLAYER 2
Multiplication Division Multiplication Division
1. 1. 1. 1.
2. 2. 2. 2.
3. 3. 3. 3.
4. 4. 4. 4.
5. 5. 5. 5.
6. 6. 6. 6.
7. 7. 7. 7.
8. 8. 8. 8.
9. 9. 9. 9.
10. 10. 10. 10.
