4.5: Critter Trades
Look at the picture below. Can you figure out how many moths you could get for 4 centipedes? In this concept, we will learn about trading and calculating the result of a trade.
Guidance
In order to solve the trading problem above, use the problem solving steps.
- Start by describing what information is given.
- Then, identify what your job is. In these problems, your job will be to figure out how many of another type of critter you could get for the critters you have.
- Next, make a plan for how you will solve. In these problems, write numbers on each of your critters and skip count to figure out how many of the new critter you will get.
- Then, solve the problem.
- Finally, check your solution. Make sure that you added the numbers correctly.
Example A
Look at the picture below. For 3 spiders, how many bees will you get? How did you figure it out?
Solution:
We can use the problem solving steps to help us.
Example B
Look at the picture below. For 4 grasshoppers, how many butterflies will you get? How did you figure it out?
Solution:
We can use the problem solving steps to help us.
Example C
Look at the picture below. For 5 flies, how many ants will you get? How did you figure it out?
Solution:
We can use the problem solving steps to help us.
Concept Problem Revisited
We can use the problem solving steps to help us.
Vocabulary
To trade means you give something and get something else back. In this concept, we calculated what we would get if we traded critters.
Guided Practice
1. For 10 scorpions, how many wasps will you get?
2. To get 6 worms, how many daddy long legs will you need to trade?
3. To get 24 ants, how many lizards will you need to trade?
Answers:
1. 40
2. 3
3. 4
Practice
- For 10 daddy long legs, how many worms will you get?
- To get 12 worms, how many daddy long legs will you need to trade?
- To get 18 worms, how many daddy long legs will you need to trade?
- For 8 flies, how many ants will you get?
- To get 35 ants, how many flies will you need to trade?
- To get 45 ants, how many flies will you need to trade?
- For 6 grasshoppers, how many wasps will you get?
- To get 42 wasps, how many grasshoppers will you need to trade?
- To get 24 wasps, how many grasshoppers will you need to trade?
Image Attributions
Description
Learning Objectives
Students reason proportionally as they trade critters. Students use problem solving steps to help them.