← All Standards

Grade 1

• Numbers & Operations: Base Ten

  • 1.NBT.1
  • 1.NBT.4

• 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.OA.3

apply properties of operations as strategies to add and subtract (e.g., If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known; to add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12)

Math Curiosity: Goldbach’s Conjecture

Can any even number be written as the sum of two primes? Goldbach thought so, but we haven’t proven it… yet!

Gr MP-5

Math Curiosity: Magic Squares

Imagine a 3×3 square in which every row, column, and diagonal have the same sum. That’s a magic square!

Gr MP-4

Math Curiosity: Odds & Squares

Why does the sum of the first 5 odds also equal 5 squared?

Gr MP-4

Math Curiosity: Palindromic Number Conjecture

Using this one weird trick, it seems that you can turn any number into a palindrome!

Gr MP-4