Răspuns:
Explicație pas cu pas:
1.
a)
15 x 7 = 105
b)
30 x 1/3 = 30/3 = 10
c)
(-2/5)*45 = -90/5 = -18
2.
3/4*(-16/9) = -4/3
-7/5*-25/28 = 5/4
e)
-31/4*8/31 = 2
2/15*(-5/4) = -1/6
d)
-8/21*-9 = 24/7
f)
-55/17*34/15*(-9/22) = 3
1.a) 7 x 15 = 105
b) 1/3 x 30 = 30 3 = 10
c) (-2/5) x 45 = -2 x 9(dupa simplificare prin 5) = -18.
