b=9 3/8 - 3 1/2 × 1 2/7 =

Відповідь:

Покрокове пояснення:

B = 9 3/8 - 3 1/2 × 1 2/7

First, let's simplify the mixed numbers:

9 3/8 = (8 * 9 + 3) / 8 = 75/8

3 1/2 = (2 * 3 + 1) / 2 = 7/2

1 2/7 = (7 * 1 + 2) / 7 = 9/7

Now, let's calculate the multiplication:

(7/2) × (9/7) = (7 * 9) / (2 * 7) = 63/14 = 9/2

Finally, subtract the result of the multiplication from 75/8:

B = (75/8) - (9/2)

To subtract these fractions, we need a common denominator:

(75/8) - (9/2) = (75/8) - (36/8) = 39/8

Therefore, B = 39/8.