Question

к)-4/7+2/7 л)5/8+(-7/12). м)-1+3/5. н)-2+1 3/4. о)3+(-1 2/7). п)2 2/3+(+-1 5/6). р)-5 1/3+4,5​

Answer 1

Ответ:

Пошаговое объяснение:

K) -2/7

Л) -35/96

М) -2/5

Н) -1/4

О) 12/7 = 1 5/7

П) 5/6

Р) -5/6

Answer 2

Let's solve each expression step by step:

к) -4/7 + 2/7 To add fractions, you need a common denominator. In this case, the common denominator is 7. (-4 + 2)/7 = -2/7

л) 5/8 + (-7/12) To add fractions, you need a common denominator. The least common multiple of 8 and 12 is 24. (5 * 3)/(8 * 3) + (-7 * 2)/(12 * 2) = 15/24 + (-14/24) = 1/24

м) -1 + 3/5 To add a whole number and a fraction, convert the whole number to a fraction with the same denominator as the fraction (5 in this case). (-1 * 5)/5 + 3/5 = -5/5 + 3/5 = -2/5

н) -2 + 1 3/4 To add a whole number and a mixed fraction, first add the whole numbers and then add the fractions separately. -2 + 1 = -1 3/4 remains the same.

So, the result is -1 3/4.

о) 3 + (-1 2/7) To subtract a mixed fraction, change the sign of the second number and then add. 3 + (-1 2/7) = 3 - 1 2/7 Now, add the whole numbers and fractions separately: 3 - 1 = 2 2/7 remains the same.

So, the result is 2 2/7.

п) 2 2/3 + (-1 5/6) To add a mixed fraction, change the sign of the second number and then add. 2 2/3 + (-1 5/6) = 2 2/3 - 1 5/6 Now, add the whole numbers and fractions separately: 2 - 1 = 1 2/3 - 5/6 = 4/6 - 5/6 = -1/6

So, the result is 1 -1/6 or 1 1/6.

р) -5 1/3 + 4.5 To add a whole number and a decimal number, convert the whole number to a decimal and then add. -5 1/3 = -5.3333... (repeating decimal) Now, add -5.3333... + 4.5 = -0.8333... (repeating decimal)

So, the result is approximately -0.83 (rounded to two decimal places).