Question

2 3/4×4/11=1 3/4×1 5/7=4 4/5×3 3/4=10×5 2/5=​

Answer 1

Ответ:

1) 2 3/4×4/11= 11/4×4/11=1

2) 1 3/4×1 5/7=7/4×12/7= 12/4=3

3) 4 4/5×3 3/4=24/5×15/4=18

4) 10×5 2/5= 10/1×27/5=54

Answer 2

Let's solve each of these multiplication problems step by step:

1. $2 \frac{3}{4} \times \frac{4}{11}$

To multiply mixed numbers, first convert them to improper fractions: $2 \frac{3}{4} = \frac{8}{4} + \frac{3}{4} = \frac{11}{4}$

Now, multiply: $\frac{11}{4} \times \frac{4}{11} = \frac{11 \cdot 4}{4 \cdot 11} = \frac{44}{44} = 1$

So, $2 \frac{3}{4} \times \frac{4}{11} = 1$.

2. $1 \frac{3}{4} \times 1 \frac{5}{7}$

Convert the mixed numbers to improper fractions: $1 \frac{3}{4} = \frac{4}{4} + \frac{3}{4} = \frac{7}{4}$ $1 \frac{5}{7} = \frac{7}{7} + \frac{5}{7} = \frac{12}{7}$

Now, multiply: $\frac{7}{4} \times \frac{12}{7} = \frac{7 \cdot 12}{4 \cdot 7} = \frac{84}{28} = \frac{3}{1} = 3$

So, $1 \frac{3}{4} \times 1 \frac{5}{7} = 3$.

3. $4 \frac{4}{5} \times 3 \frac{3}{4}$

Convert the mixed numbers to improper fractions: $4 \frac{4}{5} = \frac{20}{5} + \frac{4}{5} = \frac{24}{5}$ $3 \frac{3}{4} = \frac{16}{4} + \frac{3}{4} = \frac{19}{4}$

Now, multiply: $\frac{24}{5} \times \frac{19}{4} = \frac{24 \cdot 19}{5 \cdot 4} = \frac{456}{20} = \frac{114}{5} = 22 \frac{4}{5}$

So, $4 \frac{4}{5} \times 3 \frac{3}{4} = 22 \frac{4}{5}$.

4. $10 \times 5 \frac{2}{5}$ 0 0