Skill 1H Sums to 18 Here, we increase difficulty to answering problems with sums to 18 or less. Don't worry about these being memorized, we just want to make sure your student has the skill to figureout the answer in a reasonable time. To find the answer to problems such as these, most students count on their fingers or use a number line if available. The problem 0+10 should be able to be answered immediately since no calculations need to be done. What are the answers to the addition problems below?

