Question

-7.58+1.22; 4/7+1,7; 2 1/6 * 1 1/26

Answer 1

1)-6.36
2)=4/7+17/10=40/70+119/70=159/70=2цел 19/70
3)13/6*11/26=11/12

Answer 2

1) -7.58+1.22
-(7.58-1.22)
-6.36
2) $\frac{4}{7} + \frac{17}{10} = \frac{159}{70}$
3) $\frac{1}{3} * \frac{11}{26} = \frac{11}{78}$

Answer 3

Let's calculate the expressions one by one:

1. -7.58 + 1.22: The sum of -7.58 and 1.22 is: -7.58 + 1.22 = -6.36

2. 4/7 + 1.7: To add these fractions, we need to find a common denominator. The common denominator here is 7. So, we rewrite 1.7 as a fraction with a denominator of 7: 1.7 = 1 + 0.7 = 1 + 7/10 = 10/10 + 7/10 = 17/10 Now we can add the fractions: 4/7 + 17/10 = (4 * 10)/(7 * 10) + 17/10 = 40/70 + 17/10 To add these fractions, we need to find a common denominator, which is 70: 40/70 + 17/10 = (40 * 10)/(70 * 10) + (17 * 7)/(10 * 7) = 400/700 + 119/70 Now that we have a common denominator, we can add the fractions: 400/700 + 119/70 = (400 + 119)/700 = 519/700

3. 2 1/6 * 1 1/26: To multiply these mixed numbers, we first convert them to improper fractions. 2 1/6 = (2 * 6 + 1)/6 = 13/6 1 1/26 = (1 * 26 + 1)/26 = 27/26 Now we can multiply the fractions: (13/6) * (27/26) = (13 * 27)/(6 * 26) = 351/156 = 117/52

So, the results of the expressions are:

-7.58 + 1.22 = -6.36 4/7 + 1.7 = 519/700 2 1/6 * 1 1/26 = 117/52