Introduction

Today’s activities are all about addition, counting and place value.  They are designed to engage our young children in deep mathematical thinking as they explore possible solutions.

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A TRIP TO THE AQUARIUM

Gina went to the aquarium yesterday.
She learned that some sea animals have arms.

One of the tanks had sea stars and squid in it.
Gina counted 50 arms in the tank. Wow, that’s a lot of arms!

Show or tell what you know about the arms in the tank. Use pictures, numbers, symbols, or math words.

How can you get started?

  • Think about how many sea stars and squid it takes to make 50 arms in all.
    Remember, each sea star has 5 arms and each squid has 10 arms.
    There’s more than one right answer!

  • You might start at 0 and count by 10s and 5s to get to 50.
    Count 10 for each squid in the tank. Count 5 for each sea star.

  • If it helps, draw simple pictures to help you keep track of the total number of arms.

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BUILDING NUMBERS

Here are some different ways we can build the number 15.

Now it’s your turn…………

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TODAY’S NUMBER IS

NOW, IT’S YOUR TURN TO BUILD A NUMBER

Work together to create today’s number, 25.

Try and make 25 four ways or more!  🙂