Răspuns:
Explicație pas cu pas:
( 28 - 4) : 4 = 24 : 4 = 6
( 16 + 12) : 4 = 28 : 4 = 7
(2+4+8) : 2 = 14 : 2 = 7
______________________
c) Calculează în două moduri:
( 35 + 14) : 7 = 49 : 7 = 7 → primul mod
= 35 : 7 + 14 : 7 = 5 + 2 = 7 → al doilea mod
( 24 + 32 ) : 8 = 56 : 8 = 7 → primul mod
= 24 : 8 + 32 : 8 = 3 + 4 = 7 → al doilea mod
( 56 - 21) : 7 = 35 : 7 = 5 → primul mod
= 56 : 7 - 21 : 7 = 8 - 3 = 5 → al doilea mod
___________________
( 42 - 24) : 6 = 18 : 6 = 3
= 42 : 6 - 24 : 6 = 7 - 4 = 3
_____________________
( 18+36) : 9 = 54 : 9 = 6
= 18 : 9 + 36 : 9 = 2 + 4 = 6
_____________________
( 27 - 12 ) : 3 = 15 : 3 = 5
= 27 : 3 - 12 : 3 = 9 - 4 = 5
__________________
( 36 - 12) : 6 = 24 : 6 = 4
= 36 : 6 - 12 : 6 = 6 - 2 = 4
____________________
( 72 - 27) : 9 = 45 : 9 = 5
= 72 : 9 - 27 : 9 = 8 - 3 = 5
____________________
( 18 + 24 ) : 6 = 42 : 6 = 7
= 18 : 6 + 24 : 6 = 3 + 4 = 7
______________________________________
48 : 4 = ( 40 + 8 ) : 4 = 40 : 4 + 8:4 = 10 + 2 = 12
66 : 6 = ( 60+6) : 6 = 60 : 6 + 6 : 6 = 10 + 1 = 11
39 : 3 = ( 30 + 9) : 3 = 30 : 3 + 9 : 3 = 10 + 3 = 13
26 : 2 = ( 20+6) : 2 = 20 : 2 + 6 : 2 = 10 + 3 = 13
24 : 2 = ( 20+4) : 2 = 20 : 2 + 4 : 2 = 10 + 2 = 12
55 : 5 = ( 50+5) : 5 = 50 : 5 + 5 : 5 = 10 + 1 = 11
33 : 3 = ( 30 + 3) : 3 = 30 : 3 + 3 : 3 = 10 + 1 = 11
99 : 9 = ( 90+9) : 9 = 90 : 9 + 9 : 9 = 10 + 1 = 11
36 : 3 = ( 30+6) : 3 = 30 : 3 + 6 : 3 = 10 + 2 = 12
