Răspuns:
9x(4+4)= 9·8=72
9·4+9·4=36+36=72
2x(5-4)=2·1=2
2·5-2·4=10-8=2
6·(3+1)= 6·4=24
6·3+6·1=18+6=24
(7+1)x6= 8·6=48
6·7+6·1=42+6=48
Primul mod :
9 × ( 4 + 4 ) =
9 × 8 = 72
2 × ( 5 - 4 ) =
2 × 1 = 2
6 + ( 3 + 1 ) =
6 + 4 = 10
( 7 + 1 ) × 6 =
8 × 6 = 48
Al doilea mod :
9 × ( 4 + 4 ) =
9 × 4 + 9 × 4 =
36 + 36 = 72
2 × ( 5 - 4 ) =
2 × 5 - 2 × 4 =
10 - 8 = 2
6 + ( 3 + 1 ) =
6 + 3 + 1 =
9 + 1 = 10
( 7 + 1 ) × 6 =
7 × 6 + 1 × 6 =
42 + 6 = 48
