Introduction to Multiplication — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. An array has 4 rows and 5 columns. How many items are there?
A) 9
B) 15
C) 20
D) 25
Multiply rows by columns to find the total in an array: 4 x 5 = 20. You can also add 5 + 5 + 5 + 5 to reach 20.
2. Which skip-counting pattern shows 4 x 3?
A) 4, 8, 12
B) 3, 6, 9, 12
C) 3, 6, 9
D) 4, 8
4 x 3 means four groups of 3, so skip count by 3s four times: 3, 6, 9, 12. Each jump adds 3.
3. Which array matches 3 x 6?
A) 3 rows, 6 columns
B) 6 rows, 6 columns
C) 3 rows, 3 columns
D) 1 row, 6 columns
In multiplication, the first number is the number of rows and the second is the number of columns. So 3 x 6 matches an array with 3 rows and 6 columns.
4. Skip count by 5s: 5, 10, 15, 20, 25. How many groups of 5 is that?
A) 3
B) 4
C) 5
D) 6
Each number in the list is one jump of 5, so 5, 10, 15, 20, 25 is five jumps. That means five groups of 5.
Part B: Fill in the Blank
Write the correct answer on each line.
1. An array with 5 rows and 4 columns has 20 items.
Multiply 5 rows by 4 columns to get 20 items. You can also add 4 + 4 + 4 + 4 + 4 = 20.
2. Skip count by 6s three times: 6, 12, 18.
Skip counting by 6s adds 6 each jump, so 12 + 6 = 18.
3. 3 x 7 equals 21.
3 x 7 means 7 + 7 + 7, which adds up to 21. Skip counting by 7s three times lands on the same number.
4. An array with 6 rows and 2 columns has 12 items.
Multiply 6 rows by 2 columns to get 12. Counting by 2s six times (2, 4, 6, 8, 10, 12) gives the same total.
5. 4 x 4 equals 16.
4 x 4 is four groups of 4, which is 4 + 4 + 4 + 4. That totals 16.