Monkey Math Party: Adding to Make Teen Numbers!

Math Grades 1st Grade 2:58 Video
Print Lesson Plan Watch Video

Lesson Description

Let's throw a monkey party and learn how to add to make teen numbers using tens and ones!

Video Resource

Monkeys for a party | Place value (tens and hundreds) | Early Math | Khan Academy

Khan Academy

Duration: 2:58
Watch on YouTube

Key Concepts

  • Place value: understanding tens and ones.
  • Addition to reach a target number (within 20).
  • Representing numbers with objects (monkeys).

Learning Objectives

  • Students will be able to identify the tens and ones place in teen numbers (11-19).
  • Students will be able to use addition to solve word problems with a sum up to 20.
  • Students will be able to represent a number of objects with a written numeral.

Educator Instructions

  • Introduction (5 mins)
    Begin by asking students if they've ever planned a party. Ask what things they need for a party (e.g., food, decorations, guests). Introduce the idea that we're planning a monkey party today, and we need to make sure we have enough monkeys!
  • Video Viewing (5 mins)
    Play the Khan Academy video: 'Monkeys for a party | Place value (tens and hundreds) | Early Math | Khan Academy'. Encourage students to pay attention to how the narrator uses tens and ones to figure out how many more monkeys are needed.
  • Guided Practice (10 mins)
    After the video, review the concept of tens and ones using the monkey example. Ask: 'How many tens are in 18? How many ones?' Use manipulatives (e.g., counters, blocks) to represent the monkeys. Guide students through similar problems (e.g., 'You have 12 bananas, but you want 19. How many more bananas do you need?').
  • Independent Practice (10 mins)
    Provide students with worksheets or small whiteboards. Present them with word problems similar to the video (e.g., 'You have 11 balloons, but you want 15. How many more balloons do you need?'). Encourage them to use drawings or manipulatives to solve the problems.
  • Wrap-up (5 mins)
    Review the key concepts of tens and ones, and how they help us add. Ask students to share their strategies for solving the problems. Reiterate that we used math to solve a real-world problem of planning a party!

Interactive Exercises

  • Monkey Matching Game
    Create cards with numbers (11-19) and cards with pictures of monkeys (e.g., one group of 10 monkeys and 3 individual monkeys). Students match the number card to the corresponding monkey card.
  • Building Numbers with Blocks
    Use base-ten blocks (or connecting cubes) to represent teen numbers. Have students build the numbers by combining a ten-rod with the appropriate number of ones cubes.

Discussion Questions

  • What does the number 18 really mean? (1 ten and 8 ones)
  • How can knowing about tens and ones help us add faster?
  • Can you think of other times when we need to add more to reach a certain number?

Skills Developed

  • Addition within 20
  • Place value understanding (tens and ones)
  • Problem-solving
  • Number recognition

Multiple Choice Questions

Question 1:

Which number has 1 ten and 5 ones?

Correct Answer: 15

Question 2:

You have 10 balloons. You want 14. How many more do you need?

Correct Answer: 4

Question 3:

The number 12 has...

Correct Answer: 1 ten and 2 ones

Question 4:

If you have 10 monkeys, how many more do you need to have 17?

Correct Answer: 7

Question 5:

What is bigger? 1 ten or 5 ones?

Correct Answer: 1 ten

Question 6:

You see the number 11. How many tens do you see?

Correct Answer: 1

Question 7:

What two numbers make 16?

Correct Answer: 10 + 6

Question 8:

John has 10 toy cars. Sara gives him some more. Now he has 13 toy cars. How many did Sara give him?

Correct Answer: 3

Question 9:

If you have 7 ones and your friend gives you a ten, how many do you have?

Correct Answer: 17

Question 10:

Which of these is equal to 19?

Correct Answer: 1 ten and 9 ones

Fill in the Blank Questions

Question 1:

The number 14 has 1 ____ and 4 ones.

Correct Answer: ten

Question 2:

If you have 10 pencils and want 16, you need ____ more.

Correct Answer: 6

Question 3:

1 ten is the same as ____ ones.

Correct Answer: 10

Question 4:

13 is made of 10 + ____.

Correct Answer: 3

Question 5:

If you have 1 ten and 2 ones, you have ____.

Correct Answer: 12

Question 6:

To get from 10 to 15, you need to add ____.

Correct Answer: 5

Question 7:

The number 19 has ____ ones.

Correct Answer: 9

Question 8:

You have 1 ten. If you want 18, you need ____ more ones.

Correct Answer: 8

Question 9:

____ + 5 = 15

Correct Answer: 10

Question 10:

If you have 3 ones and add a ten, you now have ____.

Correct Answer: 13

Educational Standards

CCSS.Math.Content.1.OA.A.1:Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem. CCSS.Math.Content.1.NBT.B.2.B:The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones. CCSS.Math.Content.1.OA.C.6:Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

Teaching Materials

Download ready-to-use materials for this lesson:

Student Worksheet Classroom Slides Assessment Quiz Export to Google Docs
Add to Google Classroom

User Actions

Sign in to save this lesson plan to your favorites.

Sign In

Share This Lesson

Related Lesson Plans