• Numbers that added up to 10
  • Completing the Whole
  • Look for whole multiples of 10
  • Adding Digits of the Number
  • Aims for Tens
  • Addition with Carry
  • By Addition By Subtraction
  • Addition Left to Right
  • Mental Addition

  • Subtracting 10

  • Subtracting Numbers near Base

  • All from 9 and last from 10

  • Number Ends Zero

  • Adding Zeros

  • Less One

  • One More

  • One Less Again

  • Money

  • Easy Subtraction

  • Method 1: Subtraction using Complement

  • Method 2: Complements in the Middle

  • Method 3: Finishing With Complements

  • Subtraction in General