Theme 7.  Adding a one-digit number to a two-digit number (45 + 2). Subtracting a one-digit number from a two-digit number (45 – 2)

In the theme you learn:
• You will practice adding and subtracting round numbers up to 100;
• You will learn ways to add and subtract a one-digit number like 45 + 2, 45 – 2;
• You will solve problems to find the unknown addend, remainder, and compare numbers;
• You will calculate expressions with addition and subtraction up to 100;
• You will practice comparing a number and an expression;
• You will practice counting money.