← All Standards

Grade 1

• Measurement & Data

  • 1.MD.C.4

• Number & Operations: Base Ten

  • 1.NBT.C.4
  • 1.NBT.C.6

• Operations & Algebraic Thinking

  • 1.OA.A.1
  • 1.OA.A.2
  • 1.OA.B.3
  • 1.OA.B.4
  • 1.OA.C.5
  • 1.OA.C.6
  • 1.OA.D.7
  • 1.OA.D.8

Arizona Math Standard: 1.OA.D.8

Determine the unknown whole number in an addition or subtraction equation relating three whole numbers (e.g., determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = ? – 3, 6 + 6 = ?).

Adding and Subtracting Fruit

Use super cute fruit to introduce algebraic thinking to your young math students.

Gr 1, 2, 6

Back to School Math Worksheets

In these math problems, the solution is already given. But another number is missing!

Gr 1-6

Spring Math Worksheets: Addition and Subtraction

Four sets of 2-digit and 3-digit addition and subtraction practice. But the unknown isn’t where you expect it to be!

Gr 1-4