Question

в магазин привезли 10 ц винограда.до обеда продали 2/8 всего винограда,а после обеда 2/5 остатка.сколько винограда осталось продать?

Answer 1

1)10:8=1,25(ц)-приходится на одну часть

2)1,25*2=2,5(ц)-продали до обеда

3)10-2,5=7,5(ц)-осталось после

4)7,5:5=1,5(ц) -приходится на одну часть

5)1,5*2=3(ц)-продали после обеда

6)10-(2,5+3)=4,5(ц)-осталось

 

думаю так

Answer 2

2/8=1/4

10 ц =1/4 = 2,5

10-2,5=7,5

2/5 от 7,5 = 3

7,5-3=4,5 ц

ответ: 4,5 ц винограда осталось продать

Answer 3

Calculation of Remaining Grapes to Sell

To calculate the amount of grapes that are left to sell, we need to subtract the amount of grapes sold before lunch and after lunch from the total amount of grapes brought to the store.

Given the following information: - 10 c (c stands for centners) of grapes were brought to the store. - Before lunch, 2/8 of the total grapes were sold. - After lunch, 2/5 of the remaining grapes were sold.

Let's calculate the remaining grapes step by step:

1. Calculate the amount of grapes sold before lunch: - 2/8 of the total grapes were sold. - This can be calculated as: (2/8) * 10 c = 2.5 c.

2. Calculate the remaining grapes after lunch: - Subtract the grapes sold before lunch from the total grapes: 10 c - 2.5 c = 7.5 c. - 2/5 of the remaining grapes were sold after lunch. - This can be calculated as: (2/5) * 7.5 c = 3 c.

Therefore, the amount of grapes that are left to sell is 3 c.

Please note that the unit of measurement used here is centners (c).