# Lesson Worksheet: Multiplying by 9 Mathematics • 3rd Grade

In this worksheet, we will practice modeling multiplication by 9 and reciting the times table of 9 up to 10×9.

**Q8: **

A school bought 5 new tables for each of 9 empty classrooms. How many new tables will there be in the 9 classrooms?

**Q10: **

This robot multiplies any input by 9 to give an output.

If we give the robot an input of 2, it will give an output of 18, which is .

What would the output of the robot in the following case be?

What would the output of the robot in the following case be?

**Q11: **

The sequence chart will help us multiply by 9 using skip counting by nines up to 10 times.

Skip counting by nines | |||||||||
---|---|---|---|---|---|---|---|---|---|

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | |

11 | 12 | 13 | 14 | 15 | 16 | 17 | 19 | 20 | |

21 | 22 | 23 | 24 | 25 | 26 | 28 | 29 | 30 | |

31 | 32 | 33 | 34 | 35 | 37 | 38 | 39 | 40 | |

41 | 42 | 43 | 44 | 46 | 47 | 48 | 49 | 50 | |

51 | 52 | 53 | 55 | 56 | 57 | 58 | 59 | 60 | |

61 | 62 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | |

71 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | |

82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 |

Use skip counting to find .

Use skip counting to find .

**Q13: **

Notice the pattern in and as we proceed:

The tens increase and the ones decrease.

Use the same technique to find .

Use the same technique to find .

**Q14: **

Fill in the blank: 2 groups of 9 are equal to .

**Q15: **

David is arranging his Lego bricks in rows. Each row consists of 9 bricks.

He found that the number of Lego bricks in 2 rows can be calculated as .

Fill in the blank with the number of Lego bricks in 4 rows: .

How many Lego bricks are there in 7 rows?

**Q16: **

To complete the multiplication wheel, we simply multiply the number in the center with the ones in the middle circle, and then we write the answers in the corresponding outer blank circle.

What is the number that replaces the question mark?

What is the number that replaces the question mark?

**Q17: **

To solve , Natalie uses the following method.

Use Natalie’s method to find .

**Q19: **

We can calculate using the number line by making 2 jumps of 9, as shown.

Thus, .

Use the number line to find the result of .

**Q20: **

Each group contains 9 marbles. Use multiplication to find the number of marbles in 2 groups.