Have students write a story problem that can be solved by finding the sum of 506,211 and 424,809. have them solve the problem.

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

W-16=-12 solve each one step equation plz