Open Up - Grade 6 - Mathematics - Unit 3 - Lesson 13
By Formative Library
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Last updated almost 3 years ago
8 Questions
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1.
How can you find 50% of a number quickly in your head?
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2.
Andre lives 1.6 km from school. What is 50% of 1.6 km?
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3.
Diego lives 1/2 mile from school. What is 50% of 1/2 mile?
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4.
There is a 10% off sale on laptop computers. If someone saves $35 on a laptop, what was its original cost?
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5.
Explain how to calculate these mentally.
15 is what percentage of 30?
3 is what percentage of 12?
6 is what percentage of 10?
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6.
Noah says that to find 20% of a number he divides the number by 5. For example, 20% of 60 is 12, because 60/5 = 12. Does Noah’s method always work?
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7.
Diego has 75% of $10. Noah has 25% of $30. Diego thinks he has more money than Noah, but Noah thinks they have an equal amount of money. Who is right?
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8.
Lin and Andre start walking toward each other at the same time from opposite ends of 22-mile walking trail. Lin walks at a speed of 2.5 miles per hour. Andre walks at a speed of 3 miles per hour.
Here is a table showing the distances traveled and how far apart Lin and Andre were over time. Use the table to find how much time passes before they meet.
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Source: Open Up Resouces (Download for free at openupresources.org.)