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1.NBT.5 Resources
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Given a twodigit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
Lesson Planning and Activity Resources
1.NBTInteractive games for Numbers & Operations in Base Ten
First Grade Unit: Exploring TwoDigit Numbers
(from North Carolina Dept. of Public Instruction)
This unit addresses 1.NBT.1, 2, 3, 5 and 1.OA.6.
Grade 1 Unit: Understanding Place Value
(from Georgia Department of Education)
This unit addresses KCAS 1.NBT.26 and 1.MD.4.
http://www.commoncoresheets.com/SortedByGrade.php?Sorted=1nbt5
Interactive Material
find 10 more or 10 less than the number shown
Worksheets
on finding ten more or ten less than a two digit number.
Mental Math Resources
Link to Primary Resources site that includes power points and activites to demonstrate and practice mental math strategies.
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Given a twodigit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
Lesson Planning and Activity Resources
First Grade Unit: Exploring TwoDigit Numbers(from North Carolina Dept. of Public Instruction)
This unit addresses 1.NBT.1, 2, 3, 5 and 1.OA.6.
Grade 1 Unit: Understanding Place Value
(from Georgia Department of Education)
This unit addresses KCAS 1.NBT.26 and 1.MD.4.
http://www.commoncoresheets.com/SortedByGrade.php?Sorted=1nbt5
Interactive Material find 10 more or 10 less than the number shown
Worksheets on finding ten more or ten less than a two digit number.
Mental Math Resources
Link to Primary Resources site that includes power points and activites to demonstrate and practice mental math strategies.