Addition
Use your lines and circles to solve 31 + 59 =
90
Use your lines and circles to solve 42 - 18 =
24
Use your lines and circles to solve this problem: 82-37=
45
Simon was given this problem. He set up his problem like this 96 - 58 = 42 What did Simon do wrong?
He subtracted incorrectly! The answer should be 38!