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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 task.

Respuesta :

Ew, mental math... so basically, we would estimate the washing dishes to 20 minutes, and cleaning 40 min, 
together 20+40 min
 
is 60 minutes, aprox 1 hour

Shelly spent almost 1 hour cleaning
well what i understand this question is saying how much it is in total so you add them up and it would be 55

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