Arrays for multiplication
Use arrays to represent multiplication and division situations
What a learner can do afterwards
- Build an array of 3 rows of 4 objects to show 3 × 4
- Read an array and state the total
- Use an array to solve a simple division problem (e.g. 12 objects in rows of 4 make 3 rows)
1 · Read
When objects sit in neat rows and columns, that is an array. Arrays help you multiply and divide fast.
Mia's egg box has 3 rows. Each row holds 4 eggs. She counts 3 × 4, so she has 12 eggs. Reading backward, 12 eggs in rows of 4 make 3 rows, so 12 ÷ 4 = 3.
You can read an array backward too. 12 eggs in rows of 4 make 3 rows. That means 12 ÷ 4 = 3.
Rows and columns in an array show multiplication and division together.
Readings 'A neat grid of things', 'Building arrays' and 'Arrays help with sharing' are original to this dataset. All 9 extra questions are original to this dataset.
2 · Watch
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Where it sits
17 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.