education technologies|Friday, December 19, 2014
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Brain Teasers

Brain Teaser # 7 – The Bake Sale?

Here is the problem about multiplying fractions by whole numbers.

The fifth graders are making 4 batches of muffins for the school bake sale. They need 2/3 cup of walnuts for each batch. How many cups of walnuts do they need?

Materials:
- Deluxe Rainbow Fraction Circles (1 set per group)
- Paper (1 per group)
- Pencils (1 per group)
- Colored Pencils (1 per group)

Below is the PDF of this Lesson/Brain Teaser. You can also click the link at the very bottom to download the PDF of this Lesson/Brain Teaser… Have Fun!!!

Download PDF

Brain Teaser # – The Number Sequence?

What is special about the following sequence of numbers?
8 5 4 9 1 7 6 10 3 2 0

The numbers are in alphabetical order.
(eight, five, four, nine, one, seven, six, ten, three, two, zero)

Brain Teaser #5 – The Freezer Delima?

Here is a problem about the volume of a rectangle solid.

Mr. Adams bought a freezer. The freezer is rectangular
and the space inside it measures 3 feet long by 2 feet wide by 5 feet high. What is the volume of the space inside the freezer? Write a general formula for this volume that could be used for any length, width, and height?

Materials:

- Snap Cubes (30 per group)
- Paper (1 sheet per group)
- Pencils (1 per group)

Below is the PDF of this Lesson/Brain Teaser. You can also click the link at the very bottom to download the PDF of this Lesson/Brain Teaser… Have Fun!!!

Download PDF

Brain Teaser #2 – Zeke’s Lawn Service

Try It! in groups of 4

Here is a problem about multiplying a fraction by a fraction

Zeke runs a lawn service. He needs to find the area of a rectangular park. The park measures 3/4 mile by 1/2 mile. What is the are of the park?

Materials
- Deluxe Rainbow Fraction Squares (1 set per group)
- Fraction Squares (BLM 8; 1 per group)
- Pencils (1 per group)

Below is the PDF of this Lesson/Brain Teaser. You can also click the link at the very bottom to download the PDF of this Lesson/Brain Teaser… Have Fun!!!

Download PDF

Brain Teaser #1 – Piece it Together

Try It! in Groups of 4

Here is a problem about subtracting fractions with unlike denominators.

A cornbread recipe calls for 3/4 cup of milk. Rachel uses the last 5/8 cup of milk
in one carton. She opens another carton and pours the remaining amount
needed. How much milk does Rachel use from the newly opened carton?

Materials
• Deluxe Rainbow Fraction® Squares (2 sets
per group)
• paper (11″ x 17″; 1 sheet per group)
• pencils (1 per group)

Below is the PDF of this Lesson/Brain Teaser. You can also click the link at the very bottom to download the PDF of this Lesson/Brain Teaser… Have Fun!!!

Download PDF