Adding and Subtracting one digit from two-digit numbers No.3

Adding and subtracting 10s - No.2

Adding and subtracting two-digit numbers No.2

Adding and subtracting two-digit numbers No.3

Adding and subtracting two-digit numbers problems

Stamps collection two-digit addition and subtraction problems

Subtracting tens up to 100 No.5

At the swimming pool – Addition and subtraction of tens

Adding and subtracting 10s - No.1

Adding and subtracting 10s - No.3

Adding and subtracting two-digit numbers No.1