**12**is divisible by four because the last two digits form the number 12 and that is divisible by 4 (1312 / 4 = 328); whereas 13

*19*is not because

**19**is not divisible by 4 (1319 / 4 = 329.75). For a complete list of divisibility rules, check out this site here. Or, you could always check out this song and tutorial: Study Jams! Divide and Conquer - Rules of Divisibility.

We also learned some neat ways to divide by ten. We explored related division problems like 450 divided by 5 and 450 divided by 50 and found patterns to help us divide by multiples of 10. You can practice your multiples by playing Ghost Blasters. Then, we moved into calculating the mean and finding the range. Remember!

**Range**is the difference between the largest and smallest number of a data set, and

**average**is found by computing the sum of a set of numbers and dividing by the number of addends! Throughout, we used the long division algorithm to solve division problems. Check out all the stuff you can use on the web for practicing division under the Topic 3 Resources.

Becoming a good divider, if that is a title, takes practice! So, here is a Blendspace review that you can use to practice all the skills we have learned in Topic 3!