Make arrays to model multiplication

key notes :

What is an Array? 🟦

  • An array is a way to show objects in rows and columns.
  • Rows → go side to side
  • Columns → go up and down

Arrays and Multiplication ✖️

  • Arrays help us see multiplication visually.
  • Example: 3 rows of 4 stars = 3 × 4 = 12 ⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ⭐

Rows × Columns = Total ➕

  • Rows × Columns = Total objects
  • Example: 5 rows × 2 columns = 10 objects 🟩

Drawing Arrays ✏️

  • Draw rows first, then columns
  • Count objects to check your multiplication answer ✅

Arrays Make Multiplication Easy 💡

  • You can quickly find total objects
  • You can check your answer by counting rows or columns

Real-Life Examples of Arrays 🌼

  • Eggs in a tray 🥚 (rows × columns)
  • Chairs in a classroom 🪑
  • Cookies on a baking tray 🍪

Practice Tip 🖍️

  • Start small → 2 × 3 or 3 × 4
  • Use colors for rows and columns to make it fun! 🌈

Learn with an example

Make a rectangular array of squares to model 2 × 3 = 6.

An array that models 2 × 3 = 6 has 2 rows with 3 squares in each row.

There are 6 squares in the array.

Make a rectangular array of squares to model 4 × 3 = 12.

An array that models 4 × 3 = 12 has 4 rows with 3 squares in each row.

There are 12 squares in the array.

Make a rectangular array of squares to model 3 × 3 = 9.

An array that models 3 × 3 = 9 has 3 rows with 3 squares in each row.

There are 9 squares in the array.

let’s practice!