Denis and Dasha solve this problem in two different ways. The perimeter of a rectangle is 54 centimeters. Its length is 6 centimeters. What is its width? Use the drop-down menus to complete the sentences below. Denis's Assignment: 2 times 6 + 2 w = 54. 12 + 2 w = 54. 12 minus 12 + 2 w = 54 minus 12. 2 w = 42. w = 21. Dasha's assignment: 54 minus 2 times 6. 54 minus 12 = 42. The two widths add to 42 centimeters. 42 divided by 2 = 21. The width of the rectangle is 21 centimeters. CLEARCHECK Denis's and Dasha's methods use operations to simplify the expressions in order. Denis's method uses , but Dasha's method does not.
