1st Grade Math
1st Grade: Operations & Algebraic Thinking (1.OA)
11 Topics
1.OA.A.1 – Solve Addition/Subtraction Word Problems within 20
1.OA.A.2 – Solve Addition Word Problems within 20
1.OA.B.3 – Commutative Property of Addition
1.OA.B.3 – Associative Property of Addition
1.OA.B.4 – Understand Subtraction
1.OA.C.5 – Count by 2
1.OA.C.6 – Add within 20
1.OA.C.6 – Subtract within 20
1.OA.D.7 – Understanding Equal Sign
1.OA.D.8 – Determine unknown number in addition equation
1.OA.D.8 – Determine unknown number in subtraction equation
1st Grade: Number and Operations in Base Ten (1.NBT)
15 Topics
1.NBT.A.1 – Count to 120
1.NBT.A.1 – Read and Write Numbers to 120
1.NBT.B.2a – Understand ten as bundle of ones
1.NBT.B.2b – Decomposing tens and ones from 11 to 19
1.NBT.B.2b – Converting Numbers 11 to 19 to Standard Form or Word Form
1.NBT.B.2c – Decomposing tens and ones from 10 to 99
1.NBT.B.2c – Converting Numbers 10 to 99 to Standard Form or Word Form
1.NBT.B.3 – Compare Two-Digit Numbers
1.NBT.C.4 – Add Tens by One-Digit number
1.NBT.C.4 – Add Two-Digit number by multiple of ten
1.NBT.C.4 – Add Two-Digit number by One-Digit
1.NBT.C.5 – Add Two-Digit number by 10
1.NBT.C.5 – Subtract Two-Digit number by 10
1.NBT.C.6 – Subtract Two-Digit number by multiple of ten
1.NBT.7 – Identify Dimes and Pennies
1st Grade: Measurement and Data (1.MD)
5 Topics
1.MD.A.1 – Compare Length of Objects
1.MD.A.2 – Measure Length of Objects
1.MD.B.3 – Tell Time to the Hour
1.MD.B.3 – Tell Time to Half Hour
1.MD.C.4 – Organize & Interpret Data
1st Grade: Geometry (1.G)
3 Topics
1.G.A.1 – Identify Shapes
1.G.A.2 – Compose Shapes
1.G.A.3 – Partition Shapes
Previous Topic
Next Topic
1.NBT.C.5 – Subtract Two-Digit number by 10
1st Grade Math
1st Grade: Number and Operations in Base Ten (1.NBT)
1.NBT.C.5 – Subtract Two-Digit number by 10
Subtract Two-Digit number by 10
Want Full Access? Join The Many Satisfied MathTA Users!
SIGN UP TODAY
OR
LOGIN
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.
Math Fundamentals Menu
See All Math Fundamental Skills
ENTER NOW
Previous Topic
Back to Lesson
Next Topic
