Question

va rog 39 41 42 urgent

Answer 1

 .                                                                                                                               39. 1)  1/4, au ramas 3/4;
2)   3/6 din 3/4=3/8           1-1/4-3/8=3/8; ( DIN TOTALUL RAMAS)
3)    2/5 din 3/8=3/20=24 m 1/20=8 metri ⇒ 8X20=160 m
1)      1/4 din 60 adica 40 metri; au ramas 120 m;
2)       3/6 din 120 = 60 m
3)       2/5 din 60 = 24 m
41.                                                                                                                     1. Ce distanta parcurge cu trenul si cu masina in total ?
    5/10+4/10=9/10
2. Ce distanta parcurge pe jos ?
    10/10-9/10=1/10

      R: 1/10 a parcurs pe jos   42.                                                                                                                          8/8-soseaua intrega
2/8+1/8=3/8(soseaua facuta in alta saptamana) 
2/8+3/8=5/8(soseaua facuta in cele doua saptamani )
8/8-5/8=3/8 (portiunea de sosea ramasa )
                                   R:3/8 portiune de sosea ramasa