Question

Помогите пожалуйста выполнить умножение 1)48×(-3)= 2)-8,3×(-6)= 3)-4 2/7×1 2/5= 4)-3 3/8×(-1 7/9)=

Answer 1

1) - 144
2) 49,8
3) −533,75
4)73,8375

Answer 2

Sure, I can help you with those multiplication problems. Let's solve them step by step:

1) 48 × (-3): To multiply a positive number by a negative number, you multiply the numbers together and then change the sign of the result. So, 48 × (-3) would be -144.

2) -8.3 × (-6): When multiplying two negative numbers, the result is positive. So, -8.3 × (-6) would be 49.8.

3) -4 + 2/7 × 1 + 2/5: When performing calculations with mixed numbers, it's important to follow the order of operations (PEMDAS/BODMAS). First, we'll simplify the multiplication part:

2/7 × 1 = 2/7 2/5 × 1 = 2/5

Now, let's add the results together:

-4 + 2/7 + 2/5

To add fractions, we need a common denominator. The common denominator for 7 and 5 is 35. Let's convert the fractions:

-4 = -4/1 2/7 = (2/7) * (5/5) = 10/35 2/5 = (2/5) * (7/7) = 14/35

Now, we can add the fractions together:

-4/1 + 10/35 + 14/35

To add fractions with different denominators, we need to find a common denominator. In this case, the common denominator is 35. Let's add the numerators together:

(-4 + 10 + 14)/35 = 20/35 = 4/7

So, the result is 4/7.

4) -3 + 3/8 × (-1 + 7/9): Let's simplify the expression step by step. First, let's simplify the addition part:

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

Now, let's simplify the multiplication part:

3/8 × (-2/9) = (-2/9) * (3/8) = -6/72 = -1/12

Finally, let's add the results together:

-3 + (-1/12)

To add a whole number and a fraction, we need to convert the whole number into a fraction with a denominator of 12:

-3 = -3/1

Now, we can add the fractions together:

(-3/1) + (-1/12) = (-36/12) + (-1/12) = -37/12

So, the result is -37/12.

I hope this helps! Let me know if you have any further questions.