### Number Line Frog Hop (Addition and Subtraction)

UPDATED HTML5

Live a frog's life as you hop along a number line in search of flies. Learn how addition and subtraction can be represented as movement along a number line. Fred the frog may even help you get better at adding and subtracting two-digit numbers in your head by decomposing them into tens and ones.

#### LEARNING OBJECTIVES:

• Add numbers using a number line.
• Subtract numbers using a number line.
• Decompose a two-digit number into tens and ones.
• Mentally add/subtract by first adding/subtracting the tens and then the ones.

#### VOCABULARY:

• add, difference, equation, subtract, sum

### User Lesson Materials (3):

• EL Staff
##### Constructing Explanations Prompt - Number Line Frog Hop

This worksheet will help guide students through creating a claim, providing supporting evidence and drafting a response to on open ended Frog hop question.

• ##### Frog Number Lines Worksheet

Simplified worksheet for children in 3rd grade. Contains pictures to go with the problems to make it more visual for students.

• EL Staff
##### Seat Work for Whole Class Instruction Approach

This is a customized student exploration sheet to be used as “seat work” when the Gizmo is presented for whole class instruction. Suggestion: Review the Gizmo’s Teacher Guide and original Student Exploration Sheet to determine which parts of the Gizmo lesson need to be modeled by the teacher.

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2013, 2012, 2011, 2010, 2009, 2006 AEP

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