Question

1) 3/8×(-2 2/3)=? 2)-1,6×5/8=?3)-7/8×1 1/7=?4)4 2/3×(-3/14)=?пожалуйста помогите даю лучший ответ ​

Answer 1

Ответ:

1. -1

2. -1

3. -1

4. -1

Пошаговое объяснение:

1) 3/8×(-2 2/3)= 3/8 * (-8/3) = -1

2)-1,6×5/8= -16/10 * 5/8 = -8/5 * 5/8 = -1

3)-7/8×1 1/7= -7/8 * 8/7 = -1

4)4 2/3×(-3/14)= 14/3 * (-3/14) = -1

Answer 2

1. To solve 3/8 × (-2 2/3), we first need to convert the mixed number -2 2/3 to an improper fraction. To do that, we multiply the whole number (-2) by the denominator (3) and add the numerator (2). This gives us (-2 × 3 + 2) / 3 = (-6 + 2) / 3 = -4/3.

Now we can multiply: 3/8 × (-4/3) = (3 × -4) / (8 × 3) = -12/24 = -1/2.

Therefore, 3/8 × (-2 2/3) = -1/2.

2. To solve -1.6 × (5/8), we multiply the decimal number (-1.6) by the fraction (5/8):

-1.6 × (5/8) = -8/5 × 5/8 = (-8 × 5) / (5 × 8) = -40/40 = -1.

Therefore, -1.6 × (5/8) = -1.

3. To solve -7/8 × (1 1/7), we convert the mixed number 1 1/7 to an improper fraction. Multiply the whole number (1) by the denominator (7) and add the numerator (1). This gives us (1 × 7 + 1) / 7 = (7 + 1) / 7 = 8/7.

Now we can multiply: -7/8 × (8/7) = (8 × -7) / (8 × 7) = -56/56 = -1.

Therefore, -7/8 × (1 1/7) = -1.

4. To solve 4 2/3 × (-3/14), we convert the mixed number 4 2/3 to an improper fraction. Multiply the whole number (4) by the denominator (3) and add the numerator (2). This gives us (4 × 3 + 2) / 3 = (12 + 2) / 3 = 14/3.

Now we can multiply: 14/3 × (-3/14) = (14 × -3) / (3 × 14) = -42/42 = -1.

Therefore, 4 2/3 × (-3/14) = -1.

The answers to the given expressions are:

1. 3/8 × (-2 2/3) = -1/2
2. -1.6 × (5/8) = -1
3. -7/8 × (1 1/7) = -1
4. 4 2/3 × (-3/14) = -1.