Question

ex 8 a)3/4*1intreg3/5+1intreg3/5*1intreg3/8-1intreg1/2*1intreg3/5
ex9 a) (16,5-13intreg7/9)*6/11+2,2(8/33-1/11)+3intreg2/11
va rog urgent

Answer 1

ex 8)3/4×1×3/5+1×3/5×1×3/8-1×1/2×13/5
9/20+9/20-1×10
9/20+9/40-3/10
18+9-12 tot supra 40
15/40=3/8.
ex9 a) (16.5-13×7/9)×6/11+2.2(8/33-1/11)+3×2/11
(165/10-91/9)×6/11+22/10×/8-3/33+6/11
(33/2-91/9)×6/11+2/2×1/3+6/11
/297-182/ 18 ×6/11+2/2×1/3+6/11
115/18×6/11+1/3+6/11
115/33+1/3+6/11
/115+11+18/ 33
144/33=48/33.....

Answer 2

a) 3/4*8/5+8/5*11/8-3/2*8/5= 24/20+64/55-24/10
prima fractie o sumplifican cu 4, a doua cu 1 si a treia cu 2
6/5+64/55-13/5=-7/5+64/55 prima fractie o amplificam cu 11
-77+64/55=-13/55

a) (165/10-124/9)*6/11+22/10*5/11+35/11=( 33/2-124/9)*6/11+11/5*5/11+35/11 = in paranteza prima fractie o amplificam cu 9 iar a doua cu 2
(297-248/18)*6/11+55/55+35/11= 49/18*6/11+1+35/11= 294/198+46/11
amplificam prima fractie cu 6= 49/33+46/11 amplificam a doua cu 3= 49+138/33=187/33

si cam atat