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Contributor: Joanna D'Orazio Mignella. Lesson ID: 14127
Get ready for a math adventure! Use your rounding skills to add two-digit numbers and serve up sweet treats at your candy store. Fun, candy-filled challenges await!
Imagine walking into your very own candy store!
Jelly beans, candy corn, and gummy worms are flying off the shelves. You’ve got a line of customers all ready to buy their favorite treats.
Jump into the candy mood with the video below and get your mind thinking about these delicious treats.
Yum! Keep those tasty treats in mind while you explore how to figure out how much candy you’re selling in your store.
It is opening day at your candy store! To celebrate, you’re giving out free bags of candy to every customer.
You pack each bag with a handful of jellybeans and a scoop of gummy bears. Here's the question.
Don’t worry, you don’t have to count every single piece. You can estimate by rounding to the nearest ten. Rounding helps you add big numbers faster.
Look at this pile of 27 jellybeans.
To estimate, round 27 to the nearest ten.
Look at the number 27. The closest ten to 27 is 30. So, you can say that you have about 30 jellybeans.
Yum! That’s a tasty pile of about 30 jellybeans.
Now, look at this pile of 23 candy hearts.
Click below to see the answer.
Fantastic job! The closest ten is 20, so you have about 20 candy hearts.
Here's a tip: when you round, underline the digit in the tens place. Then, check the ones place to see if you should round up or down.
If the digit in the ones place is 4 or below, round down to the nearest ten.
If the digit in the ones place is 5 or above, round up to the nearest ten.
Look at more candy.
Great job, candy star!
Candy Store Customer 1
Your customers are ready to buy! Rounding helps you add numbers quickly so you can give them the right amount of candy.
Your first customer wants to buy one bag of 38 marshmallows and one bag of 13 gummy bears.
First, round 38 and 13 to the nearest tens.
38 rounds to 40.
13 rounds to 10.
Now, add them up.
40 + 10 = 50
Great job! Your customer bought about 50 candies.
Candy Store Customer 2
Here comes another customer! They want to buy 45 chocolate bars and 19 licorice sticks.
Way to go! Your customer bought a lot of yummy candy!
Rounding really makes math sweet! Head over to the Got It? section for some more candy-filled practice.
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