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)
17 Topics
1.NBT.A.1 – Count to 20
1.NBT.A.1 – Read and Write Numbers to 20
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.B.2c – Decomposing tens and ones from 10 to 99

1st Grade Math 1st Grade: Number and Operations in Base Ten (1.NBT) 1.NBT.B.2c – Decomposing tens and ones from 10 to 99

Decomposing tens and ones from 10 to 99


Want Full Access? Join The Many Satisfied MathTA Users!

SIGN UP TODAY

OR

LOGIN

1.NBT.B.2c

Understand the numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).

Math Fundamentals Menu

See All Math Fundamental Skills

ENTER NOW

Previous Topic
Back to Lesson
Next Topic