jak to obliczyć a) -3/4 + (-3/4) b) -1-(-4/7) c) -0,75+1/4
a)
-3/4 + (-3/4) = -3/4 - 3/4 = -(3/4 + 3/4) = -6/4 = -(+3/2) = -3/2 = -1 i 1/2
b)
-1-(-4/7) = -7/7 + 4/7 = -(7/7 - 4/7) = -(+3/7) = -3/7
c)
-0,75 + 1/4 = -75/100 + 1/4 = -(3/4 - 1/4) = -(+2/4) = -2/4 = -1/2
lub
-0,75 + 0,25 = -(0,75-0,25) = -0,5
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a)
-3/4 + (-3/4) = -3/4 - 3/4 = -(3/4 + 3/4) = -6/4 = -(+3/2) = -3/2 = -1 i 1/2
b)
-1-(-4/7) = -7/7 + 4/7 = -(7/7 - 4/7) = -(+3/7) = -3/7
c)
-0,75 + 1/4 = -75/100 + 1/4 = -(3/4 - 1/4) = -(+2/4) = -2/4 = -1/2
lub
-0,75 + 0,25 = -(0,75-0,25) = -0,5