Shelley spent 17 minutes washing the dishes. She spent 38 minutes cleaning her room. Explain how you can use mental math to find how long Shelley spent on the two tasks
It took Marty 42 minutes to write a book report. Then he spent 18 minutes correcting his report. Explain how you can use mental math to find how long Marty spent on his book report.
Dear guest, you are not a registered member. As a guest, you only have read-only access to our books, tests and other practice materials.
(request help)
(show solution)
