proszę o zrobienie zadania 16 i 17 może być też 18 dzięki
i jeszcze proszę o obliczenia !! dzięki dam naj naj :)
zadania w załączniku!!
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zad 16
a)
3,2 * 1 3/8 : 2,75 = 32/10 * 11/8 : 275/100 = 44/20 * 100/275 = 16/20 = 4/5
b)
(4 2/9 + 5 1/3) : (2,5 - 1 2/9) = ( 4 2/9 + 5 3/9) : (2 5/10 - 1 20/90) =
= 9 5/9 : (2 45/90 - 1 20/90) = 86/9 : 1 25/90 = 86/9 : 115/90 = 86/9 * 90/115 =
= 860/115 = 172/23= 7 9/23
c)
(3,2 - 1,5 * 1 1/3) : 0,04 = (3,2 - 15/10 * 4/3) : 4/100 = (3,2 - 4/2) * 100/4 =
= (3,2 - 2) * 100/4 = 1,2 * 100/4 = 12/10 * 100/4 = 30
d)
(1/2)² * 2,4 + (1/3)² * 2,7 = 1/4 * 24/10 + 1/9 * 27/10 =
= 6/10 + 3/10 = 9/10
zad 17
a) 3 -7 = -4
b) -4 - 8 1/2 = - 12 1/2
c) 9 - (-3,75) = 9 + 3,75 = 12,75
d) -4 2/3 - (-3 1/4) = -4 8/12 + 3 3/12 = -1 5/12
e) 15 - 7 1/2 = 7 1/2
f) - 12,2 - (-4,8) = -12,2 + 4,8 = - 7,4
g) 12 + (-3) = 9
h) 13,5 - (-4 1/2) = 13,5 + 4,5 = 18
i) (-0,2) - (-3/4) = (-2/10) + (3/4) = (-8/40) + 30/40 = 22/40 = 11/20
j) -3 * 4,5 = - 13,5
k) - 7,5 * (-1,4) = 10,5
l) -3,25 * 1 1/2 = - 3,25 * 1,5 = - 4,875
m) -3 * 4 * (-2,5) = -12 * (-2,5) = 30
n) - 3/8 * 2 2/3 * (-1 1/3) = -3/8 * 8/3 * (-4/3) = 4/3 = 1 1/3
o) 4,2 : (-0,6)= -7
p) 5,4 : (-9) = - 0,6
r) - 10 1/2 : (- 1,5) = - 21/2 : (-1 5/10) = -21/2 : (- 15/10) =
= - 21/2 * (- 10/15) = 7
s) - 2 2/3 : 4 = - 8/3 * 1/4 = - 2/3