The sum of 20, 30, and 45 is calculated by adding the three numbers together. So, 20 + 30 + 45 = 95. This is because addition is a basic arithmetic operation where you combine the values of the numbers to find the total.
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20 + 45 = 65 20 x 45 = 900
600/50 = 12
Let the unknown number be n.Then 20 + n = 30 : Subtract 20 from both sides gives :-20 - 20 + n = 30 - 20 : n = 10
No.
20 + 10 = 30 20 x 10 = 200 200 - 30 = 170 Your answer is 170.