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.
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 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 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 .
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 .
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?
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