Theme 8.  Addition and subtraction within 20 without regrouping

In the theme you learn:
• You will improve your skills in adding and subtracting numbers of the second ten using place value;
• You will find the number of tens and ones in two-digit numbers up to 100;
• You will improve your skills in comparing named numbers shown in decimeters and centimeters;
• You will learn to add and subtract numbers within 20 without regrouping;
• You will practice counting money.