4-2 Making Reasonable Estimates for Products Lesson

4-2 Making Reasonable Estimates for Products Lesson

Key to today's lesson, make sure you do the following when solving problems.

• Make sense of the problem. Draw picture on your paper or board or build an idea inside your head.

• Find out what the question is asking you to solve. If needed, find a way to estimate or round your numbers.

• Set up a graphic organizer like a part part whole box so you can decide to add, subtract, multiply, or divide.

• Solve and show your steps and thinking until you find a solution that makes sense.

• Record your final answer.

Fill in the Blank

If a housefly beats its wings 190 times per second. About how many times is that per second?

Go ahead and round 190 to the nearest hundred and type in your answer.

___ beats per second

Fill in the Blank

How many more times is 400 beats per second than 200 beats per second?

Fill in the Blank

How many seconds are there in 1 minute?

__ seconds

Multiple Select

What basic fact would you use to solve how many times a housefly beats its wings? Click all that apply.

200 x 60 = ?

• 2 x 6 = 12

• 6 x 2 = 12

• 12 - 2 = 6

• 6 + 2 = 12

• 2 x 6 = 200

Fill in the Blank

How many times does the wasp beats its wings in a minute?

60 x 400 = ?

Fill in the Blank

How many times does the housefly beats its wings in a minute?

60 x 200 = ?

Fill in the Blank

How much more is 24,000 seconds than 12,000 seconds?

Fill in the Blank

Now actually solve how many times the housefly beats its wings. If the housefly beats its wings 190 times per second. How many times would that be in 1 minute?

190 x 60 = ?

Fill in the Blank

Onto the final answer, the wasp beats its wings for 24,000 times per minutes and a housefly beats its wings 12,600 times per minutes. How many more times does a wasp beat its wings than a housefly?

24,000 - 12,600 = ?