Question

Mă puteți ajuta?????
Vă rog urgent.

Answer 1

a) 2/5 x 10/14 =2/7 (se simplifica 2 cu 14, 5 cu 10)
b) -1/4× 8/9= - 2/9 ( se simplifica 8 cu 4)
c) -12/5 × (-25/36) = 5/3= 1 intreg si 2/3  ( se simplifica 12 cu 36, 5 cu 25, (-):(-)=+
d)4 ×(-1/8)=-1/2  (4/8 se simplifica cu 4)
e) (- 2/3) × 1= - 2/3 
f)  -3/4 × (-1) = 3/4 deoarece (-):(-)=+
g) 117/361 × 0 = 0
h) 4/3×(-1/5)×(-15/8)=3/3=1
i) -1/4×8×(-1)=8/4=2
j) 3/4×301/903 × (-12)= - 3 × 1/3 × 3= - 3
k) - 1/18 ×5/73 ×18=- 5/73
l)  (4x2+1)/2 × ( -2/3)=9/2 × (-2/3)= - 3
m) (3x4+1)/4 ×(1x4+1)/4=13/4 ×5/4= 65/4 =16 intregi si 1/4
n) -(2x3+2) / 3 × 3/15 × 9/8= - 8/3 x 3/15 × 9/8=9/15= 3/5

2 intregi si 2/3 = (2x3+2)/3 =8/3 ( introducerea intregilor in fractie)