# 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.

Q1:

Complete:

Q2:

Use , , or to fill in the blank:

• A
• B
• C

Q3:

Complete the table.

Multiply by 9
2
3
4   36
• A27, 45
• B18, 27
• C36, 45
• D27, 36
• E18, 36

Q4:

Fill in the blank: .

Q5:

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? Q6:

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

Skip counting by nines
1234567810
111213141516171920
212223242526282930
313233343537383940
414243444647484950
515253555657585960
616264656667686970
717374757677787980
8283848586878889

Use skip counting to find .

Use skip counting to find .

Q7:

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 .

Q8:

Notice how each row is 9 more than the previous one: Find the result of the following: Find the result of the following: Q9:

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

Q10:

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? 