Explains the concept of zero in mathematics, emphasizing its role as a number that represents the empty set. It illustrates how zero is used in addition and subtraction, showing that adding or ...

Three. You're amazing. For this lesson, our learning intention is to solve subtraction problems using a number line and the counting back strategy. When we are subtracting it means you are getting ...

So, you make a jump of 6 and a jump of 2 on the number line. Altogether, that's a jump of 8 to get from 64 to 72. Therefore: 72 - 64 = 8 This method for subtraction is best when the numbers are ...

Take a look at this number line. It shows 14 - 5 = 9. You can count backwards down the number line to subtract. Look at this part-whole model. There is a number missing from one of the parts.