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Arrays and Area Models

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Arrays and Area Models

Use rows and columns to help you multiply. Show your thinking where asked.

Read and describe arrays

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1.How many rows and columns does Array A have, and how many counters are there altogether?

2.Which multiplication sentence matches Array A?

3 × 5 = 15
3 + 5 = 8
5 × 5 = 25
3 × 4 = 12

3.An array has 4 rows with 6 buttons in each row. Complete the sentence: × = .

4.True or false: An array with 2 rows of 9 tiles has 18 tiles.

TrueFalse

Make and use arrays

5.Draw an array with 4 rows and 3 objects in each row. Then write the multiplication sentence and the total.

6.A weather station stores 3 trays with 8 rain gauges in each tray. How many rain gauges are stored altogether?

7.Jai arranges 18 weather symbols in equal rows. Write two different row-and-column arrangements he could make. Give a multiplication sentence for each.

8.Match each array description to its total.

2 rows of 7
4 rows of 5
3 rows of 6
5 rows of 4

9.A rectangular floor patch is 4 squares long and 5 squares wide. Use the rows and columns to find its area in square units. Write a multiplication sentence.

10.In one or two sentences, explain how rows and columns can help you work out the total in an array.