← All Standards

Grade 1

• Geometry

  • 1.G.1
  • 1.G.2
  • 1.G.3

• Measurement & Data

  • 1.MD.1
  • 1.MD.2
  • 1.MD.4

• Numbers & Operations: Base Ten

  • 1.NBT.1
  • 1.NBT.2.a
  • 1.NBT.2.c
  • 1.NBT.2
  • 1.NBT.4
  • 1.NBT.5
  • 1.NBT.6

• Operations & Algebraic Thinking

  • 1.OA.1
  • 1.OA.2
  • 1.OA.3
  • 1.OA.4
  • 1.OA.5
  • 1.OA.6
  • 1.OA.7
  • 1.OA.8

CCSS Math Standard: 1.NBT.2.c

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)

What If There Were No Hundreds Place?

Imagine a world with no hundreds place. We’d have to call it ten tens instead. But then, what would we call the thousands place? How would we read 9999? What if we added one more?

Gr 1, 2, 3, 4, 5, 8