Question

Calculați,: 1/4 din 100; 2/3 din366; 2/5 din 75; 3/7 din 777; 11/4 din 64;4/9 din 162; 3/11 din 143; 1 intteg 1/13 din 1001

Answer 1

1/4 din 100= 25
2/3 din 366=244
2/5 din 75= 30
3/7 din 777=333

Answer 2

$1)\frac{1}{4} \times 100 = \frac{1 \times 100}{4} = \frac{100}{4} = 25$

$2)\frac{2}{3} \times 366 = \frac{2 \times 366}{3} = 2 \times 122 = 244$

$3)\frac{2}{5} \times 75 = \frac{2 \times 75}{5} = 2 \times 15 = 30$

$4)\frac{3}{7} \times 777 = \frac{3 \times 777}{7} = 3 \times 111 = 333$

$5)\frac{11}{4} \times 64 = \frac{11 \times 64}{4} = 11 \times 16 = 176$

$6)\frac{4}{9} \times 162 = \frac{4 \times 162}{9} = 4 \times 18 = 72$

$7)\frac{3}{11} \times 143 = \frac{3 \times 143}{11} = 3 \times 13 = 39$

$8)1 \frac{1}{13} \times 1001 = \frac{1 \times 13 + 1}{13} \times 1001$

$= \frac{13 + 1}{13} \times 1001$

$= \frac{14}{13} \times 1001$

$= \frac{14 \times 1001}{13}$

$= 14 \times 77$

$= 1078$