Dział : kolejnosc wykonywania dzialań
Wykonaj działana:
a) 1 1/9 - 1/25 : (-0,2)^2 + 1 2/3
b)4^2 + 3^2 * 1/5 + (-3/4) ^2
c) [ 2^-1 + 2^-2 + (-2)^-3] :2^-1
Ps. ^2 lub ^ -2 itp. oznaczaja doslownie np. do poteki drugiej lub do potegi minus drugiej
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b)
a) 1i1/9 -1/25 :(-2)^2 +1 i2/3 = 10/9 -1/25 :4 + 5/3= 10/9 -1/25* 1/4 +5/3=
= 10/9 -1/100 +5/3 = 1000/900 - 9/900 + 1500/900 = 2491/900= 2 i 691/900
b) 4^2 +3^2*1/5 +(-3/4)^2 = 16 +9 *1/5 + 9/16 = 16 +9/5 +9/16 =
= 16+ 144/80+45/80 = 16 i 189/80 = 18 i 29/80
c) [2^-1 +2^-2 +(-2)^-3] : 2^-1 = [ 1/2 + 1/4 +(-1/8)] : 1/2 = [4/8 +2/8 -1/8]:1/2=
= 5/8 : 1/2 = 5/8 * 2/1 = 5/4 * 1/1 = 5/4 = 1 i 1/4