Question

В швейной мастерской было 300 м.ткани .За первую неделю израсходавали 2\5 запаса ткани ,за вторую - 4\9 остатка .какая часть ткани осталось

Answer 1

300-300×$\frac{2}{5}$=300-120=180 м. израсх. за 1-ую неделю
180-180×$\frac{4}{9}$=180-80=100 м. израсх. за 2-ую неделю
300-(180+100)=20 м. или 1/15 часть ткани осталась

Answer 2

300/5*2=120 м (1 нед.)
120/9*4=53,333... м (2 нед.)
300-120-53,33=126,666≈127 (осталось)
ответ такой вряд-ли может быть, но если с округлением, то нормально

Answer 3

Calculation of Remaining Fabric in the Sewing Workshop

To calculate the remaining fabric in the sewing workshop, we need to determine the amount of fabric used during the first and second weeks and subtract it from the initial fabric stock of 300 meters.

1. Calculation for the First Week: - The fabric used during the first week is 2/5 of the total fabric stock. - Therefore, the fabric used during the first week is (2/5) * 300 = 120 meters.

2. Calculation for the Second Week: - The fabric used during the second week is 4/9 of the remaining fabric after the first week. - The remaining fabric after the first week is 300 - 120 = 180 meters. - Therefore, the fabric used during the second week is (4/9) * 180 = 80 meters.

3. Calculation of the Remaining Fabric: - To find the remaining fabric, we subtract the fabric used during the first and second weeks from the initial fabric stock. - Remaining fabric = Initial fabric stock - Fabric used during the first week - Fabric used during the second week. - Remaining fabric = 300 - 120 - 80 = 100 meters.

Therefore, 100 meters of fabric are left in the sewing workshop after the first and second weeks