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Multiplication Arrays and Addition

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Multiplication Arrays and Addition

Use rows and columns to represent each multiplication. Show your thinking where a working space is provided.

Arrays and repeated addition

1.Draw an array to represent 6 × 4. Use six rows with four dots in each row.

2.For the 6 × 4 array, how many rows and how many columns are there?

3.Write 6 × 4 as repeated addition by adding the number in each row. Then find the total.

4.Which number is the product of 8 × 7?

Arrays in everyday situations

5.A baker places 7 muffins on each tray. Draw an array for 5 trays, with one row for each tray.

6.Write a multiplication equation for 5 trays with 7 muffins on each tray, then calculate the total.

7.Write the muffin total as repeated addition, adding the number of muffins on each tray.

8.There are 9 shelves with 8 books on each shelf. How many books are there altogether?

Array challenges

9.Draw two different rectangular arrays that each contain 18 dots. Write a multiplication equation for each array.

10.Which repeated addition matches 4 × 9 when there are four rows of nine?

4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4
9 + 9 + 9 + 9
4 + 9
9 + 9 + 9

Connect the strategies

11.Match each multiplication to the repeated addition that has the same total.

3 × 8
4 × 6
5 × 7

8 + 8 + 8
6 + 6 + 6 + 6
7 + 7 + 7 + 7 + 7

12.A sports club sets out 8 rows of 9 cones. Show a multiplication equation and a repeated-addition calculation to work out how many cones are needed.

13.A rectangular array has 6 rows and 12 columns. How many objects does it contain? Show a calculation.

14.How does an array make it easier to find a total? Give one clear reason.