Question

calcula.
1. 6 1/4 + 7 3/4 - 2
2. 3 1/2 + 0,50 - 4​

Answer 1

Respuesta:

1. 6 1/4 + 7 3/4 - 2

= 25/4 + 21/4 - 2

=  25/4 + 21/4 - 2/1

=  25/4 + 21/4 - 8/4

= 38/4 = 19/2 (FRACCION) = 8 3/2 (MIXTO) = 9.5 (DECIMAL)

2. 3 1/2 + 0,50 - 4​

= 7/2 + 1/2 - 4/1

= 7/2 + 1/2 - 8/2

= 8/2 - 8/2 = 0

Answer 2

Respuesta:

✍Primer problema

Transformar de mixto a fracción:

$6 \frac{1}{4} = 6 \times 4 + 1 = \frac{25}{4} \\ \\ 7 \frac{3}{4} = 7 \times 4 + 3 = \frac{31}{4}$

Sumar:

$\frac{25}{4} + \frac{31}{4} - 2 = \frac{(1)(25) + (1)(31) - (4)(2)}{4} = \\ \\ = \frac{25 + 31 - 8}{4} = \frac{48}{4} = 12$

Respuesta: 12

✍Segundo problema:

$3 \frac{1}{2} = 3 \times 2 + 1 = \frac{7}{2} \\ \\ 0.50 = \frac{5}{10}$

Sumar:

$\frac{7}{2} + \frac{5}{10} - 4 = \frac{(5)(7) + (1)(5) - (10)(4)}{10} \\ \\ = \frac{35 + 5 - 40}{10} = \frac{40 - 40}{10} = \frac{0}{10} = 0$

Respuesta: 0