Solving mathematical puzzles daily can greatly improve your problem-solving skills. It not only exercises your brain but also ...
Using addition and subtraction in multi-step problems This animated film from the BBC Teach shows you how to answer multi-step problems.
12 - 5 = 7 Just like with addition, we can use a part-whole model to help partition larger numbers to make them easier to deal with in subtraction problems. First, partition 35 into 30 and 5.