Don’t Subtract Add I am learning that problems like 34 + ? = 51 and 51 – 34 = ? have the same answer. e.g. 34 + 17 = 51 and 51 – 34 = 17.
Equal Additions I am learning to solve subtraction problems by equal additions that turn one of the numbers into a tidy number. Numbers like 10, 20, 30,
Don’t Subtract Add
Adapted from the work of Lucie Cheeseman and Lisa Heap
Jumping the number line I am learning to jump through a tidy number on a number line to solve problems like 17 + …. = 91 Numbers like 10, 20, 30, 40 etc.
Cross Products
