Common Core
4.NF.B.3
4 lessons teach this standard. Every lesson is interactive, and every one prints as a worksheet with a separate answer key.
Grade 4 Math · Chapter 5 · Lesson 1
The bottom number names what you are counting.
Grade 4 Math · Chapter 5 · Lesson 4
Adding Fractions with the Same Unit
Count the units. The name does not change.
Grade 4 Math · Chapter 5 · Lesson 5
You cannot count two different things together.
Grade 4 Math · Chapter 5 · Lesson 6
Whole ones and some pieces left over.