Question

oblicz:

a) 3-15-5=

b)-7+11-6

c)5-(-12)-7+14

d)-2-(-8)-6-3

e)1,6 - 2 1/6 -1

f) -3 1/4+2,75-0,6

to: 2 1/6 to dwa i jedna szósta

3 1/4 trzy i jedna czwarta

Answer 1

a) 3-15-5 = -12-5 = -17

 

b) -7+11-6 = 4-6 = -2

 

c) 5-(-12)-7+14 = 5+12-7+14 = 17-7+14 = 10+14 = 24

 

d) -2-(-8)-6-3 = -2+8-6-3 = 6-6-3 = 0-3 = -3

 

e) 1,6 - 2 1/6 - 1 = 16/10 - 13/6 - 1 = 48/30 - 65/30 - 30/30 = -17/30 - 30/30 = -47/30 = -1 17/30 (minus jeden i 17 trzydziestych)

 

f) -3 1/4 + 2,75 - 0,6 = -13/4 + 2 3/4 - 6/10 = -65/20 + 55/20 - 12/20 = -10/20 - 12/20 = -22/20 = -11/10 = -1,1