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 Mariam_6809 #1 Posted : Monday, June 21, 2021 12:46:51 AM Rank: NewbieGroups: Registered Joined: 5/27/2021Posts: 5Thanks: 0 timesWas thanked: 0 time(s) in 0 post(s) This might be a bit of a dumb question :,) But my mental math is very weak and I struggle to do quick calculations. On one of the questions, we had to divide 0.55g/204.2, the answer was about 0.0027. But I personally have no idea how to do this in my head. I tried rounding to 0.5 and 200, but I still wasn't sure. Back to top User Profile
 INSTR_Katrina_128 #2 Posted : Tuesday, June 22, 2021 5:19:33 PM Rank: Advanced MemberGroups: Registered Joined: 5/18/2021Posts: 73Thanks: 0 timesWas thanked: 0 time(s) in 0 post(s) Not a dumb question at all! Mental math is hard. ðŸ˜¥First, let's approximate these values:0.55 / 204.2 = 0.5 / 200Then, let's do a SNEAKY TRICK:0.5 / 200 = 0.5 / (2 x 100)mwahahaha...So, let's divide 0.5 by 2, and THEN divide it by 100.0.5 / 2 = 0.25Then, divide by 100 (aka move the decimal place over by 2)0.25 / 100 = 0.0025Heeeeey that's not so bad! ðŸ˜€ Back to top User Profile
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