Question

А)0,7+3/5 б)1/6*0,8 в)12:2,8

Answer 1

А)=1,3
б)=1,33333...
в)≈4.286...

Answer 2

7/10+3/5*2=7/10+6/10=13/10=1 3/10
Б)1 6/10*8/10=16*8/10=128/10= 12 4/5
В)12:2 8/10= 120/10 : 28/10=120/28=3 1/2

Answer 3

А) To add 0.7 and 3/5, we need to find a common denominator. The denominator of 0.7 is 1, and the denominator of 3/5 is 5. We can rewrite 0.7 as 0.7/1 to match the denominator of 5.

0.7/1 + 3/5

To add fractions, we need a common denominator, which in this case is 5. We can multiply the numerator and denominator of 0.7/1 by 5 to get the same denominator:

(0.7/1) * (5/5) + 3/5 (3.5/5) + 3/5

Now that both fractions have the same denominator, we can add the numerators:

(3.5 + 3)/5 6.5/5

The result is 6.5/5.

B) To multiply 1/6 and 0.8, we multiply the numerators and denominators:

(1/6) * 0.8

Multiplying fractions is straightforward. Multiply the numerators together and multiply the denominators together:

1 * 0.8 = 0.8 6

The result is 0.8/6.

C) To divide 12 by 2.8, we simply perform the division:

12 / 2.8

Dividing decimals is similar to dividing whole numbers. We divide 12 by 2.8:

12 ÷ 2.8 ≈ 4.2857

Rounded to four decimal places, the result is approximately 4.2857.