Question

 doar cele incercuite

Answer 1

4)
a) 85 x 7/10 =17 x7/2=119/2 = 59,5
b) 96 x 13/12 = 8x13=104
c) 96 x 8/15 = 32 x8/5 =256/5 = 51,2
d) 63 x 7/18 = 7 x 7/2=49/2=24,5
e) 75 x 3/20 = 15 x 3/4=45/4=11,25
f) 98 x 5/21= 14 x 5/3=70/3 =23,(3)

5)
a) 560 x 5/24 = 70 x 5/3 = 350/3= 116,(6)
b) 294 x 11/28 = 21x11/2=231/2=115,5
c) 336 x 13/30 = 56 x13/5 =728/5 = 145,6
d) 192 x 9/40 = 24 x 9/5 = 216/5= 43,2
e) 105x 7/45 = 7 x 7/3=49/3=16,(3)
f) 105x 25/63= 5 x 25/3=125/3 =41,(6)

6)
a) 52 x 3/4 = 13 x 3 = 39
b) 84 x 6/7 = 12x6=72
c) 65 x 4/5 = 13 x4 =52 
d) 72 x 5/8 = 9 x 5 = 45
e) 63x 4/9 = 7 x 4=28
f) 96x 5/6= 16 x 5=80

7)
a) 45 x 3/15 = 3 x 3 = 9
b) 72 x 5/12 = 6x5=30
c) 64 x 7/16 = 13 x4 =52 
d) 90 x 7/18 = 5x7 = 35
e) 84x 9/14 = 6 x 9=54
f) 96x 5/24= 4 x 5=20