This week is a busy week. I learned about mutiples and power. I learned three methods. The first one is M-D-P. It need to add the exponent on the top first, and then subtraction the exponent. And then you multiply the exponent by the exponent. The second, is D-M-P. Subtract x from the top first, And then subtract the exponents. The last one is P-M-D. This method I find a little tricky because it’s a big calculation. There have three formula. First one: a*x a*=a(m+n) Second one is a*devide by a*=a(m-n). The third one is (a*)*=a(mxn).