주요 내용
Math
Common Core Math
Grade 3: Number and Operations in Base Ten
3.NBT.A
Use place value understanding and properties of operations to perform multi-digit arithmetic.
3.NBT.A.1
Fully covered
3.NBT.A.2
Fully covered
- Add 2- and 3-digit numbers (no regrouping)
- Add and subtract on a number line
- Add using groups of 10 and 100
- Add within 1000
- Adding 10 or 100
- Adding 1s, 10s, and 100s
- Adding 3-digit numbers
- Adding 3-digit numbers (no regrouping)
- Adding and subtracting on number line
- Addition using groups of 10 and 100
- Break apart 3-digit addition problems
- Break apart 3-digit subtraction problems
- Breaking apart 3-digit addition problems
- Estimate to add and subtract multi-digit whole numbers
- Estimate to subtract multi-digit whole numbers
- Estimating when adding multi-digit numbers
- Estimating when subtracting large numbers
- Find the missing number (add and subtract within 1000)
- Methods for subtracting 3-digit numbers
- Missing number for 3-digit addition within 1000
- Missing number for 3-digit subtraction within 1000
- Select strategies for adding within 1000
- Select strategies for subtracting within 1000
- Subtract 2- and 3-digit numbers (no regrouping)
- Subtract on a number line
- Subtract within 1000
- Subtracting 1, 10, or 100
- Subtracting 1s, 10s, and 100s
- Subtracting 3-digit numbers (no regrouping)
- Subtracting 3-digit numbers (regrouping)
- Subtraction by breaking apart
- Three digit addition word problems
- Three digit subtraction word problems
- Using place value to add 3-digit numbers: part 1
- Using place value to add 3-digit numbers: part 2
- Worked example: Subtracting 3-digit numbers (regrouping from 0)
- Worked example: Subtracting 3-digit numbers (regrouping twice)
- Worked example: Subtracting 3-digit numbers (regrouping)
3.NBT.A.3
Fully covered