• If the two sides are equal, then the sentence is true.
  • 3 – 2 = 1
  • 4 – 4 = 4
  • The first sentence is true because the two sides are equal.
  • 3 – 2 = 1
  • The second sentence is false because the two sides are not equal.
  • 4 – 4 is equal to 0, not 4.
  • 3 – 2 = 1
  • 4 –3 = 2
  • The first sentence is true because the two sides are equal.
  • 3–2=1
  • The second sentence is false because the two sides are not equal.
  • 4–3 is equal to 1, not 2.
  • 2 – 2 = 1
  • 4 –4 = 0
  • The first sentence is false because the two sides are not equal.
  • 2–2 is equal to 0, not 1.
  • The second sentence is true because the two sides are equal.
  • 4–4=0