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2010-03-19T16:27:37+01:00
A) (3,6+4x(-¹/₂))x10=16
b)(¹/₂x(-4)+2,4x5)x5=20
c)-15,2
2010-03-19T16:29:08+01:00
A)3,6+4×(-½)²=3,6+4×(-¼)=3,6-1=2,6
2,6 - 10%
x - 100%
x=2,6×100%/10%
x=26
b)½×(-4)+2,4×5=-2+12=10
10 - 20%
x -100%
x=10×100%/20%
x=50
c)4,8:(-8)-12,8×¼=-0,6-3,2=-3,8
25%-(-3,8)
100%-x
x=100%×(-3,8)/25%
x=-15,2