Where have I gone wrong? Please reply if you know! #maths #MathsToday #ProblemSolving process #thinking #overthink #problem #school #skill #thoughtoftheday #math #interest Also, do you know, 152,207 x 365 = 55,555,555 ? 🆒
My process to do 152207 × 375 by ( 100000 + 52000 + 207 ) × (300 + 70 + 5):
Drawn a 2 dimensional data table in plain text. The columns are 300, 70, 5 and the rows are 100000, 52000, 207. My mental maths of row 1: 30,000,000 , 700,000 , 500,000. Row 2: I multiplied 300 with 52000, addition of 15000000 ( 3×5000000 ) and 600000 ( 3×0200000 ), answered "156000000". Then 70×52000, 3500000 ( 7×500000 ) + 140000 ( 7×020000 ) = "3640000". Then 5×52000, 250000 ( 5×50000 ) + 10000 ( 5×2000 ) = "260000". Then row 3 of 3: 207 × 300 = 600 00 + 2100 = "62100" , 207 × 70 = 14000 + 490 = "14490" , 207 × 5 = 1000 + 35 = "1035". Added the 3 rows: 30 700 500 + 159 900 000 + 77 625 = "190 678 125". My answer was addition of all the values of the table cells added up: 190678125. Visual layout of the text document and "Schulrechner" web calculator answer of 57077625 added (image).





