10 More and Less
1st Grade


Alabama Course of Study Standards:
14

Given a twodigit number, mentally find 10 more or 10 less than the number without having to count, and explain
the reasoning used. 
Arkansas Academic Standards:
1.NBT.C.5

Mentally find 10 more or 10 less than a given twodigit number, without having to count
Note: Students should be able to explain the reasoning used. 
Arizona Academic Standards:
1.NBT.C.5

Given a twodigit number, mentally find 10 more or 10 less than the number, without having to count. 
Common Core State Standards:
1.NBT.C.5
Georgia Standards of Excellence (GSE):
1.NR.5.2
North Carolina  Standard Course of Study:
1.NBT.5
New York State Next Generation Learning Standards:
1.NBT.5

Given a twodigit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used. 
Massachusetts Curriculum Frameworks:
1.NBT.C.5

Given a twodigit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used. Identify arithmetic patterns of 10 more and 10 less than using strategies based on place value. 
Tennessee Academic Standards:
1.NBT.C.5

Mentally find 10 more or 10 less than a given twodigit number without having to count by ones and explain the reasoning used. 
Texas Essential Knowledge and Skills (TEKS):
1.5.C

use relationships to determine the number that is 10 more and 10 less than a given
number up to 120; 
Pennsylvania Core Standards:
CC.2.1.1.B.3

Use placevalue concepts and properties of operations to add and subtract within 100. 
Florida  Benchmarks for Excellent Student Thinking:
MA.1.NSO.2.2

Add two whole numbers with sums from 0 to 20, and subtract using related facts with procedural reliability. 
Georgia Standards of Excellence (GSE):
1.NR.5.2

Given a twodigit number,
mentally find 10 more or 10
less than the number, without
having to count; explain the
reasoning used. 
