224
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448 ÷ 2 = (400 ÷ 2) + (40 ÷ 2) + (8 ÷ 2)
But that's a lot of extra energy. Any time the number is all even digits, just cut them in half. 224
The easiest way to solve this problem is to turn it into an equation. The problem poses two unknowns which can be written as x and 1/4x (or 0.25x). We are told that the sum of x and 0.25x (=1.25x) = 560, so now we have an equation we can solve:1.25x = 560 ; now we divide both sides by 1.25 to get the value for xx= 560/1.25x = 448(1/4 of 448 = 112; 448 + 112 = 560; QED)Another way to solve this is to see the figures as percentages:x = 100%560 =125% (from the question we know that 560 is 1 1/4 times x, 1/4 is 25%)x = 560 x 100 ÷ 125x = 448(1/4 of 448 = 112; 448 + 112 = 560; QED)
448
7/8 * 64= 448/8= 56====
8√7. Since the square root of 4 is 2 you just keep dividing the number by 4 and multiplying 2 outside the radical until you get to a number not divisible by 4. (√448 = √[112*4] = 2√112) then (2√112 = 2√[28*4] = 4√28) then (4√28 = 2√[7*4] = 8√7)
448