MATEMATYKA SUMA ALGEBRAICZNA
a) 1/2a - 1/4a =
b) 6,7xy + 5xy - 12,5xy =
c) 5a² - 9a² + 3 1/2a² =
a) 3/4 a
b) - 0,8 xy
c) - 0,5 a ( do 3 )
a) 1/2a - 1/4a = -1/4a = - 0,25a
b) 6,7xy + 5xy - 12,5xy = 11,7xy - 12,5xy = -0,8xy
c) 5a² - 9a² + 3 1/2a² = -4a² + 3,5 a² = -0,5a²
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a) 3/4 a
b) - 0,8 xy
c) - 0,5 a ( do 3 )
a) 1/2a - 1/4a = -1/4a = - 0,25a
b) 6,7xy + 5xy - 12,5xy = 11,7xy - 12,5xy = -0,8xy
c) 5a² - 9a² + 3 1/2a² = -4a² + 3,5 a² = -0,5a²