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Open Number Lines Activities - Printable or Google Classroom 2.NBT.B.5

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Description

Activities for teaching the open number line strategy so kids can add and subtract fluently within 100 using open number lines. Plan quickly with no prep practice pages. Build strong understanding of two-digit addition and subtraction using strategies based on number sense and place value.

**Easy to use for distance learning!** Digital layer already added - Assign in Google classroom with the TpT digital activity tool and kids can draw lines with the pen and enter answers in text boxes.

Contents:

*Open number lines overview for teachers

*Using open number lines to add and subtract, 4 review pages using standard number lines

*Adding and subtracting 10 on an open number line

*Adding and subtracting multiplies of 10 (2 pages)

*Adding and subtracting tens, then ones (4 pages)

*Think 10 to add 9

*Think 10 to subtract 9

*Think 10 to add 11

*Think 10 to subtract 11

*Working with near multiples of 10 (4 page)

*Problem solving with open number line (4 page)

*Answer Key

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**For personal and single classroom use only. If using with multiple classrooms, please purchase additional licenses at a reduced rate**

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Total Pages
26 pages
Answer Key
Included
Teaching Duration
3 Weeks
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Standards

to see state-specific standards (only available in the US).
Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.
Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers 0, 1, 2,..., and represent whole-number sums and differences within 100 on a number line diagram.

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