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10 More and Less

1st Grade

Alabama Course of Study Standards: 14

Given a two-digit 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 two-digit number, without having to count

Note: Students should be able to explain the reasoning used.

Arizona - K-12 Academic Standards: 1.NBT.C.5

Given a two-digit 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 two-digit 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 two-digit 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 two-digit 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 place-value 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 two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

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