The ratio of the screen length to the screen width of a 34 inch TV set is 4:3. The screen length of this TV set is 68cm. What's the screen width

The ratio of the screen length to the screen width of a 34 inch TV set is 4:3. The screen length of this TV set is 68cm. What's the screen width

68÷4×3=51cm

Simple operation 4800 / 25
one
Simple operation 4800 divided by 25
two
A regular pentagonal flower bed, each side of 6 pots of flowers, each vertex placed a pot, how many pots can be placed?
three
Square flower bed, a week a total of 12 pots of flowers, each vertex placed a pot, then each side can put how many pots?
Please explain why
One more
A square flower bed is 40 meters long, each 5 meters placed a pot of rose, a total of how many pots can put?

1、＝48×100÷25＝48×4＝192
2. (6-1) × 5 = 25, each vertex has a basin, which can be counted on two sides. Therefore, subtracting 1 from the number of each side means that it is counted on only one side
3. The reason is the same as that of question 2

12 + 14 + 16 + 18 + ······ + 30 =? Simple calculation

12+14+16+18+······+30=（12+30）×5=210