Array Fun: Learning Repeated Addition!

Mathematics Grades 2nd Grade 11:43 Video
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Lesson Description

Learn how to use arrays to make addition easier and more fun! Discover how to find the total number of objects by adding the same number again and again.

Video Resource

Repeated Addition using Arrays | 2nd Grade Math | Kids Academy

Kids Academy

Duration: 11:43
Watch on YouTube

Key Concepts

  • Arrays as a visual representation of addition
  • Repeated addition
  • Columns and Rows

Learning Objectives

  • Students will be able to identify arrays.
  • Students will be able to represent addition problems using arrays.
  • Students will be able to solve addition problems using repeated addition with the aid of arrays.

Educator Instructions

  • Introduction (5 mins)
    Begin by showing the video 'Repeated Addition using Arrays | 2nd Grade Math | Kids Academy'. Engage students by asking them what they already know about addition. Briefly introduce the concept of arrays as a way to organize objects and make addition easier.
  • Exploring Arrays (10 mins)
    After watching the video, discuss what an array is. Emphasize that an array is an arrangement of objects in rows and columns. Use examples from the video (apples, pears, tomatoes, oranges) to illustrate the concept. Ask students to identify the number of rows and columns in each array.
  • Repeated Addition (15 mins)
    Explain how arrays can help with repeated addition. For example, if an array has 3 rows and each row has 4 apples, we can add 4 + 4 + 4 to find the total number of apples. Work through several examples together, writing the repeated addition sentences on the board. Have students participate by counting and adding aloud.
  • Hands-on Activity (15 mins)
    Provide students with manipulatives such as small blocks or counters. Give them addition problems and ask them to create arrays to solve them. For example, 'Show 2 + 2 + 2 using an array.' Have them draw their arrays on paper and write the corresponding addition sentence.
  • Wrap-up and Assessment (5 mins)
    Review the key concepts of arrays and repeated addition. Ask students to explain in their own words how arrays can help with addition. Collect their array drawings as a formative assessment.

Interactive Exercises

  • Array Creation
    Provide students with a worksheet containing different array patterns (e.g., a 2x3 array, a 3x4 array). Ask them to write the repeated addition sentence that represents each array.
  • Problem Solving
    Present word problems that can be solved using arrays and repeated addition. For example, 'Sarah has 4 rows of stickers, and each row has 5 stickers. How many stickers does Sarah have in total?'

Discussion Questions

  • What is an array?
  • How can arrays help us add?
  • Can you think of examples of arrays in everyday life?

Skills Developed

  • Addition
  • Problem-solving
  • Visual representation

Multiple Choice Questions

Question 1:

What is an array?

Correct Answer: Objects in rows and columns

Question 2:

Which addition sentence shows 2 + 2 + 2?

Correct Answer: 2 + 2 + 2

Question 3:

If an array has 3 rows of 4 apples, how many apples are there in total?

Correct Answer: 12

Question 4:

What is repeated addition?

Correct Answer: Adding the same number again and again

Question 5:

Which of these is NOT an array?

Correct Answer: A scattered pile of toys

Question 6:

What are the lines that go up and down in an array called?

Correct Answer: Columns

Question 7:

If you have 2 rows of 5 cookies, what addition problem can you use to find the total?

Correct Answer: 5 + 5

Question 8:

What does adding the same number again and again help us find?

Correct Answer: The total amount

Question 9:

Which number sentence matches an array with 4 columns and 2 rows?

Correct Answer: 4+4

Question 10:

Which of these things represents the real life examples of rows and columns?

Correct Answer: Tiles on the floor.

Fill in the Blank Questions

Question 1:

An array has _____ and columns.

Correct Answer: rows

Question 2:

Adding the same number over and over is called _____ addition.

Correct Answer: repeated

Question 3:

If you have 3 rows of 2 blocks, you can add 2 + 2 + 2 to find the _____.

Correct Answer: total

Question 4:

An array helps us to see _____ patterns.

Correct Answer: addition

Question 5:

The lines going across in an array are called _____.

Correct Answer: rows

Question 6:

4 + 4 + 4 is the same as adding _____ three times.

Correct Answer: 4

Question 7:

In an array, each row has the _____ number of objects.

Correct Answer: same

Question 8:

Using arrays makes _____ easier to understand.

Correct Answer: addition

Question 9:

If a box of chocolates has four rows with 5 chocolates in each row, how many chocolates are there? Use _____ addition to solve.

Correct Answer: repeated

Question 10:

Tiles on the floor are good examples of rows and _____

Correct Answer: columns

Educational Standards

2.N.2.6:Use concrete models and structured arrangements, such as repeated addition, arrays, and ten frames to develop an understanding of multiplication. 2.N.2.4:Use strategies and algorithms based on knowledge of place value and equality to add and subtract two-digit numbers.

Teaching Materials

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