Zad.1.
Wykonaj działania :
a)2 3/4+11 4/5-8,5=
b)5 1/4-7,8+4 7/8=
c)3,5*1 1/14-2 1/2=
d)3,5*1 1/14-2 1/2=
Zad 2.
Oblicz:
a)(-7)*(-4)-(-44):11+3*(-8)=
b)(-6)(do potęgi2)*(-2)-(-15)*(-3)+(-72):(-24)=
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a)2 3/4+11 4/5-8,5 = 2 15/20 + 11 16/20 - 8,5 = 13 31/20 - 8,5 = 14 11/20 - 8,5 = 14,55 - 8,5 = 6,5
b)5 1/4-7,8+4 7/8= 5,25 - 7,8 + 4 7/8 = -2,55 + 4 7/8 = - 2 11/20 + 4 7/8 = - 2 22/40 + 4 35/40 = 2 57/40 = 3 17/40
c)3,5*1 1/14-2 1/2= 3 5/10 * 1 1/14 - 2 1/2 = 35/10 * 15/14 - 2 1/2 = 105/28 - 2 1/2 = 3 21/28 - 2 1/2 = 3 21/28 - 2 14/28 = 3 7/28 = 3 1/4 = 3,75
Zad 2.
Oblicz:
a)(-7)*(-4)-(-44):11+3*(-8)= 28 - (-4) + (-24) = 32 + (-24) = 8
b)(-6)(do potęgi2)*(-2)-(-15)*(-3)+(-72):(-24)= 36 * (-2) - 45 - 3 = (-72) - 45 - 3 = (-177) - 3 = (-180)
mam nadzieje że jest dobrze ;) ale na wszelki wypadek posprawdzaj ;pp
licze na naaj ;d