Addition and Subtraction

Addition and Subtraction can be solved by using two stategies: counting on/back, rounding and compensating.

Counting on is adding forward using fingers, when the number added is under ten. Counting back is subtracting using fingers, when the number subtracted is under ten

Rounding and compensating is rounding the added or subtrated number to the nearest tidy number, then compensating for the rounding. Compensating is done by slitting the new number into the old number and the leftover.

Counting on/back and rounding and compensating is easy stategies to use addition and subtraction, when numbers get too big to be solved with basic facts.

Party Popper Prototype

My company, The Toy Designers, created our prototype of our party popper.

First we collected all our material to create our party popper. We chose a plastic cup to make the confetti flig into the air. Then we poked a hole inside to put the rubber band inside.

Second we added the medium rubber into the hole in the prototype party popper. It's hard for our company to put the rubber band in the cup. 

To finish up our prototype, by adding the weight and stopper onto our prototype. Our weight and stopper is a dice and a toothpick

I learned a lot about building our prototype, and the party popper was sucessful. Toy Designers need to add more updates to our party popper.