intro 40 350 7 Estimating with Mental Math reminder 370 50 2 Since it's mental math, try and do these in your head before writing them down. What would the total be if 30 was used instead of 25? 300 What operation will you use for this problem? Click the correct answer. 17 + - x ÷ x What the estimated amount of money Kyla made? 340 comment 3 The more practice you do, the easier it'll be!