Oh, what a happy little math problem we have here! To make 28 using 1, 2, 3, and 4, you can simply add them together: 1 + 2 + 3 + 4 + 18 = 28. Just like painting, sometimes all you need is a few simple elements to create something beautiful!
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It can be: (5*6)-21 = 28
To make 28 using the numbers 1, 2, 3, and 4, you can use the following mathematical operations: (4 x 3) + 2 + 1 = 12 + 2 + 1 = 15. Then, add 13 to 15 to get 28: 15 + 13 = 28.
((7-2) * 4) + 8 = (5 * 4) + 8 = 20 + 8 = 28
Convert the mixed number to an improper fraction, make the two fractions equivalent fractions with the same denominator, and compare the numerators: 1 1/2 = (1×2+1)/2 = 3/2 3/2 = (3×5)/(2×5) = 15/10 15 < 28 → 15/10 < 28/10 → 1½ < 28/10 → No; 1½ is not greater than 28/10
28=1*2*2*7 28=2*14,-2*-14 28=4*7, -4*-7 28=1*24, -1*-24