[tex]\it a)\ \dfrac{3}{5}\cdot1,5=0,6\cdot1,5=0,9\\ \\ b)\ \dfrac{42}{5}:8,4=8,4:8,4=1\\ \\ c)\ \dfrac{5}{2}\cdot2,7=2,5\cdot2,7=6,75[/tex]
Răspuns:
a) 3/5 x 1,5=
2(3/5)×15/10=
6/10×15/10=
90/10=9
b) 42/5 : 8,4=
2(42/5):84/10=
84/10:84/10=1
c) 5/2 x 2,7 =
5/2× 27/10=(5×27)/20
=27/4=6,75
d) 7,4 : 2,5=
74/10:25/10=
74/25=2,96=296/100
e) 5,6 : 12/10=
56/10:12/10 = 56/12=14/3
f) 3,7 x 9/6=
37/10×96/10=
(37×96)/100=
3552/100=1776/50=35,52
g) 5,6 x 3/2 : 0,5=
56/10×3/2:5/10=
56/10×3/2×10/5=
(56×3×10)/(10×2×5)=
1680/100=168/10=16,8
h) 11/4 x 2,3 : 3/5=
11/4×23/10:35/10=
(11×23×10) / (4×10×35)=
(11×23)/(4×35)=253/140=18,07143
Explicație pas cu pas:
