A young kangaroo is 24 inches long. A young zebra is 43 inches long. How much shorter is the kangaroo?

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Presentation transcript:

A young kangaroo is 24 inches long. A young zebra is 43 inches long. How much shorter is the kangaroo?

In this lesson you will learn how to solve length word problems by using rulers.

Let’s Review Measurement 5 centimeters longer snake worm

A word problem is a mystery that needs to be solved!

Core Lesson A young kangaroo is 24 inches long. A young zebra is 43 inches long. How much shorter is the kangaroo? What do I know? What am I trying to figure out? ? What am I trying to figure out? The kangaroo is inches shorter than the zebra.

Core Lesson

A young kangaroo is 24 inches long. A young zebra is 43 inches long. How much shorter is the kangaroo? kangaroo zebra 19 spaces 19 inches The kangaroo is 19 inches shorter than the zebra.

Core Lesson

It took 17 paper clips to measure the width of a model volcano. Each paper clip is an inch long. It took twice as many push pins. How many pins did it take? What do I know? What am I trying to figure out? ? What am I trying to figure out? The volcano is push pins wide.

What does twice mean? Twice means two times. The volcano is 34 push pins wide. It took 17 paper clips to measure the width of a model volcano. Each paper clip is an inch long. It took twice as many push pins. How many pins did it take?

Core Lesson A ruler is like a number line.

A Common Misunderstanding When measuring, you have to count the lines on the ruler. When measuring, you need to count the spaces.

10 inches long7 inches long6 inches long x x

In this lesson you have learned how to solve length word problems by using rulers.