Question

calcule mentalmente

a) 3-¹+2/3
b) 3-¹.9
c) 7-².49
d) 6-²+39/36​

Answer 1

Resposta:

a) -1 +2 = 1

3 3 3

b)-1 ×9 = -9 = 3

3 3 1

c ) 1 × 49 =49 = 1

49 49

d) 1 +39= 40 = 10

36 36 36 9

Answer 2

• de acordo com o enunciado vem:

 a)  1/3 + 2/3 = 1

 b) 1/3 * 9 = 3

 c) 1/49 * 49 = 1

 d)  1/36 + 39/36 = 40/36 = 10/9