Question

1. 27 + 16 - 19+54 =
95 -13 - 37 +15=
87-56 +32-19=
63+12 - 14+24=

2. a + 16 +34 - 18 = 45
18+ b - 27 +38=53
17+29-c+42 =47.

Answer 1

Răspuns:

1)

=43‐19+54=24+54=78

=82-37+15=45+15=60

=31+32-19=63-19=44

=75-14+24=61+24=85

2)

a+16+34=45+18

a+16+34=63

a+16=63-34

a+16=29

a=29-16

a=13

18+b-27=53-38

18+b-27=15

18+b=15+27

18+b=42

b=42-18

b=24

17+29-c=47-42

17+29-c=5

46-c=5

c=46-5

c=41