Theme 6.  Problems about decreasing a number by several units

In the theme you learn:
• You will improve your skills in solving problems about increasing a number by several units;
• You will learn to solve problems about decreasing a number by several units;
• You will practice choosing the right solutions for problems;
• You will improve your skills in adding and subtracting numbers up to 10;
• You will practice finding the sum of three addends and the difference with two subtrahends;
• You will repeat the composition of numbers 6, 7, 8, 10.