II >> Addition - two digits

  • 4.1 Add multiples of 10

  • 4.2 Add a two-digit and a one-digit number - without regrouping

  • 4.3 Add a two-digit and a one-digit number - with regrouping

  • 4.4 Add two two-digit numbers - without regrouping

  • 4.5 Add two two-digit numbers - with regrouping

  • 4.6 Write addition sentences to describe pictures

  • 4.7 Addition input/output tables - up to two digits

  • 4.8 Ways to make a number using addition

  • 4.14 Add three or more numbers up to two digits - word problems