Question

- 1 7/8 * 1 1/3 = 1 2/3 : (-3 1/3)=Раскройте скобки и найдите значение выражения:23,6 + ( 14,5 - 30,1) - (6,8 + 1,9)=

Answer 1

1) 14,5-30,1=-15,6
2) 6,8+1,9=8,7
3)23,6-15,6=8
4) 8-8,7=-0,7

Answer 2

Let's solve the expressions step by step:

1. Multiplication:

To multiply fractions, we multiply the numerators together and the denominators together. Then we simplify the resulting fraction if possible.

1 7/8 * 1 1/3 = (8/8 + 7/8) * (3/3 + 1/3) = 15/8 * 4/3 = (15 * 4) / (8 * 3) = 60/24 = 5/2 = 2 1/2

So, 1 7/8 * 1 1/3 equals 2 1/2.

2. Division:

To divide mixed numbers, we convert them into improper fractions, then multiply the first fraction by the reciprocal of the second fraction.

1 2/3 : (-3 1/3) = (5/3) : (-10/3) = (5/3) * (-3/10) = (5 * -3) / (3 * 10) = -15/30 = -1/2

So, 1 2/3 : (-3 1/3) equals -1/2.

3. Addition and Subtraction:

23.6 + (14.5 - 30.1) - (6.8 + 1.9) = 23.6 + (-15.6) - 8.7 = 23.6 - 15.6 - 8.7 = (23.6 - 15.6) - 8.7 = 8 - 8.7 = -0.7

Therefore, 23.6 + (14.5 - 30.1) - (6.8 + 1.9) equals -0.7.