Question

От 5метоовой доски отпилили два куска один длиной 1/4м второй 2/5м сколько метров доски осталось

Answer 1

5-1/4-2/5 = (5*20 - 1*5 - 2*4) / 20 = 87/20 = 4,35м

Answer 2

Calculating Remaining Length of the Board

To calculate the remaining length of the board after cutting two pieces, we can add the lengths of the two pieces and subtract the total from the original length of the board.

The first piece is 1/4m long and the second piece is 2/5m long.

The total length of the board is 5m.

Calculation

The total length of the two pieces is: 1/4m + 2/5m

To add these fractions, we need to find a common denominator. The common denominator for 4 and 5 is 20.

1/4m = 5/20m 2/5m = 8/20m

Adding these together: 5/20m + 8/20m = 13/20m

Now, we subtract the total length of the two pieces from the original length of the board: 5m - 13/20m

Result

The remaining length of the board is 4 7/20m.

This calculation is based on the provided lengths and the original length of the board.