Students multiply and divide decimals by powers of 10 in this festive winter math activity that doubles as classroom décor. Students multiply decimals by 0.01, 0.1, 10, 100, 1000 and divide decimals by 10, 100 and 1000. 100 and 1000 are expressed as 10^2 and 10^3 in ornaments #25-#44. Ornaments #45-#50 ask students to multiply decimals by negative powers of 10. These last 6 ornaments could be given as an extension or as an added challenge.Problems type examples:3.24 x 0.1 = (12 ornaments)12.03 ÷