The answer is 156.
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-99
Instead of adding each digit in turn, acknowledge that there are 100 numbers to add, and then multiply that by the average of 1 and 100.Ie. 100×(1+100)÷2=100×101;÷2100×101;÷2=50×101=5050So, in short, the answer is: 5050
Come on! It’s 50: 101 divided by 2 equals 50.5 51x2= 102 so is too big to go into 101 50x2= 100 so it’s the closest you can get to 101 101-100=1 so it’s 50 and remainder 1, or... you could just do 101/2=50.5
100 times 101 divided by 2 is equal to 5,050.
1 +100 = 101 100 - 1 = 99 99 +1 = 100 100 times 100 =10000 10000 divide by 2 = 5050Ans:5050