Number and Operations in Base Ten

What Your Child Will Learn

Domain: Number and Operations in Base Ten

Make or break apart numbers from 11 to 19 into ten ones and some more ones. Use objects or drawings,
and record each with an equation (e.g., 18 = 10 + 8) (K.NBT.1)
Quarter 4

Vocabulary

  • Place Value: The value of the place of the digit in the number (For example: in 27, 2 is in the 10's place and is worth 20)
  • Compose: Putting numbers together to make a new number (For example: 5+10=15)
  • Decompose: Breaking a number apart (For example: 15=8+7)
  • Equation: A mathematical statement containing an equal sign, to show that two expressions are equal
  • Add: To join two or more numbers
  • Subtract: To take one quantity away from another
  • Ten: A group of ten ones