c) Dacă -1 +7
3
b
atunci
b
3
a
7
35. Efectuați calculele:
3 5 3
a)
7 2 15
-7 14
b
11 22 38
9 35 5 15
5 63 7 21
19
C)
75
45
5
d) -2 +2
3
26
13
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Răspuns:
a)3/7-15/30=3/7-1/2=6/14-7/14=-1/14
b)-7/11×11/7-1/2=-1-1/2=-3/2
c)-9/5×5/9-5/7×7/5=-1-1=-2
d)-2+5/3×(-12/25)×45/13=-2-60/75×45/13=-2-4/5×45/13=-2-180/75=-150/75-180/75=-330/75