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-11,4+..11..=-2/5
....1,3% (procenta).....=13%.(promila)
0,4=.....400....... promili
Wstaw w odpowiednich miejscach nawiasy:
a)3x-2y+1-(x+y)=2x-3y+1
b)4m+2n-3+m-(n+1)=5m+n-4
c)-2t+u-(w+t-1)+w=-3t+u+1
d)-3x²-(2x-1-5x²)+3-(7x²-3x)=-5x²+x+4
b)(4m+2n)-3+(m-n)+1=5m=(n-4)
c)(-2t+u)-(w+t)-(1+w)=-(3t+u)+1
d)(-3x)²-2x(-1-5x)²+3(-7x)²-3x=-(5x)²+x+4