Theme 4.  Making subtraction equations from addition equations

In the theme you learn:
• You will practice finding the sum and difference of two numbers;
• You will learn about the connection between addition and subtraction;
• You will learn to make subtraction equations from addition equations;
• You will practice solving addition and subtraction problems up to 10;
• You will improve your skill to find the length of a line with a ruler and choose the right measurement result.