6. PROBLEMS PROBLEM SOLUTION TIPS Estela brush her teeth's 3 times at the day, she spend 2 liters of water. Gustavo brush him teeth's 2 times at day, he spends 3 liter of water. How many times both brush their teeth`s in a week and how many liters day spend when they brush their teeth`s? Estela brushherteeth`s 3 times at day, and if are 7 days so I multiply 7x 3 = 21 times and 6 litersbecauseshebrushherteeth`s 3 times a day and shespend 2 litersvery time she do it, so 2 x 3 = 6 Gustavo I do the same. Estela 3 x 7 = 21 2 x 3 = 6 Gustavo 2 x 7 = 14 3 x 2 = 6
