Question

1) 5/6*7/9 11/28*7/33 1 8/25*1 4/13 3 5/7*1 1/13 2)1 5/19*(6-3 5/8) 1,8*(6,3*1,4-2,05)

Answer 1

1) 5/6*7/9=5*7/6*9=35/54
11/28*7/33=11*7/28*33=77/924=7/84
1 8/25*1 4/13=33/25*17/13=33*17/25*13=561/325=1 236/325
3 5/7*1 1/13=26/7*14/13=26*14/7*13=364/91=4

2)1 5/19*(6-3 5/8)=24/19*(3-5/8)=24/19*2 3/8=24/19*19/8=3
1,8*(6,3*1,4-2,05)=1,8*(8,82-2,05)=1,8*6,77=12,186

Answer 2

Let's solve the expressions step by step:

Expression 1:

1. $\frac{5}{6} \times \frac{7}{9}$

To multiply fractions, multiply the numerators together and the denominators together: $\frac{5 \times 7}{6 \times 9} = \frac{35}{54}$

2. $\frac{11}{28} \times \frac{7}{33}$

Again, multiply the numerators together and the denominators together: $\frac{11 \times 7}{28 \times 33} = \frac{77}{924} = \frac{11}{132}$

3. $\frac{8}{25} \times \frac{4}{13}$

Multiplying the numerators and denominators: $\frac{8 \times 4}{25 \times 13} = \frac{32}{325}$

4. $\frac{5}{7} \times \frac{1}{13}$

Multiplying the numerators and denominators: $\frac{5 \times 1}{7 \times 13} = \frac{5}{91}$

Expression 2:

1. $1 \frac{5}{19} \times \left(6 - 3 \frac{5}{8}\right)$

First, convert the mixed number $1 \frac{5}{19}$ to an improper fraction: $\frac{24}{19} \times \left(6 - \frac{29}{8}\right)$

Now solve the expression inside the parentheses: $\frac{24}{19} \times \frac{23}{8} = \frac{552}{152} = \frac{69}{19}$

2. $1.8 \times (6.3 \times 1.4 - 2.05)$

First, calculate the expression inside the parentheses: $6.3 \times 1.4 - 2.05 = 8.82 - 2.05 = 6.77$

Now multiply 1.8 by the result: $1.8 \times 6.77 = 12.186$

So, the results of the expressions are:

• $\frac{35}{54}$
• $\frac{11}{132}$
• $\frac{32}{325}$
• $\frac{5}{91}$

• $\frac{69}{19}$
• $12.186$