(44 - 4)/4
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To make 15 using only four 4s, we can use basic arithmetic operations such as addition, subtraction, multiplication, and division. One way to achieve this is (4 + 4 + 4) - 4 = 12 - 4 = 8. Another way is (4 x 4) - (4 ÷ 4) = 16 - 1 = 15. In total, there are several ways to make 15 using only four 4s, and it requires creative thinking and manipulation of numbers.
(-4) - (4) - (4/4)
21,600 using only four significant figures is still 21,600.
(-7 -9)*(-3)/2 = (-16)*(-3)/2 = 48/2 = 24