At present, five identical dice are arranged in a row, as shown in the figure. The first five digits are 5,2, 1, 3,5, the first five digits are 2,3,4,5,6, and the leftmost digit is 1. What is the sum of the points at the bottom of the five dice? (Math problem in the second volume of the fifth grade)

Answer: Take a dice and see which number corresponds to the opposite. The corresponding numbers should be: 1 to 6, 2 to 5, 3 to 4. ....

The sum of the two sides of each dice is equal to 7.

Knowing the above, you can work out the following.

By the sum of five opposite faces =5*7=35

So the sum of the base points of these five dice is 35-(5+2+1+3+5) =19.