Question

Oblicz:
a) 3 1/4 - 2 3/4=
b) 13 1/7 + 2 2/3=
c) 1 3/5 * 2 1/4=
d) 4 2/3 - 1/3 : 2=
e) 3 3/4 : 5/6 - 1/4 * 1 2/3=
f) 1 2/5 *3 4/7- 2 1/8 * 2 6/17=

Rozwiąż równanie:
g) 15-3*k=7
h) 2/3*s-6=24

Pomóżcie nie wiem jak to zrobić. Plisss!!! DAJE NAJ!!

Answer 1

A)
3 1/4 - 2 3/4 = 2 5/4 - 2 3/4 = 2/4 = 1/2
b)
13 1/7 + 2 2/3 = 13 3/21 + 2 14/21 = 15 17/21
c)
1 3/5 * 2 1/4 = 8/5 * 9/4 = 72/20 = 3 12/20 = 3 3/5
d)
4 2/3 - 1/3 : 2 = 4 2/3 - 1/3 * 1/2 = 4 2/3 - 1/6 = 4 4/6 - 1/6 = 4 3/6 = 4 1/2
e)
3 3/4 : 5/6 - 1/4 * 1 2/3 = 15/4 * 6/5 - 1/4 * 5/3 = 90/20 - 5/12 = 4 10/20 - 5/12 = 4 1/2 - 5/12 = 4 6/12 - 5/12 = 4 1/12
f)
1 2/5 * 3 4/7 - 2 1/8 * 2 6/17 = 7/5 * 25/7 - 17/8 * 40/17 = 175/35 - 680/136 = 5 - 5 = 0

g)
15 - 3*k = 7       / -15
-3k = -8     / : (-3)
k = 8/3 = 2 2/3
h)
2/3 * s - 6 = 24          / + 6
2/3 * s = 30     / * 3/2
s = 90/2 = 45