1. Consider the face value of money first: 100, 50,20, 1 0,5,1.

It needs four dollars, and the single digits are removed. Now the problem is simplified. The bill of 5 16 adds up to 13 10.

2. Let 100 be a, 50 be b, 20 be c, 10 be d, and 5 be e..

Equations:100a+50b+20c+10d+5e =1310.

a+b+c+d+e=5 16

Only when e=2 or d= 1, the mantissa will appear 10. Anyway, if we take a method and there is no complete solution, then we will not give D (face value 10 yuan).

E = 2 (2 out of 5)

Equations:100a+50b+20c =1300.

A+b+c=5 14 has no solution.

Try again when d= 1 (1 ten pieces).

Equations:100a+50b+20c =1300 Simplified: 10a+5b+2c= 130.

a+b+c=5 15 a+b+c=5 15

And a, b and c are all positive values, and there is no solution!

Sorry, buddy, your idea is good, but it can't be realized. I also want to figure out how to propose to my girlfriend like this.

Score, thank you ~ ~ ~ The topic is quite good and interesting ~ ~ ~

No, I miscalculated. Also consider RMB with a face value of 0. 1.20.5, which should be solved. I'll try again, 13 14/520=2.5269, which means that 2.5 yuan is a little more on average.

It has been solved! It has been solved! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !

Answer: 9010,4081,7 0.5, 10 0.2 and 5 0. 1!

90* 10+408* 1+7*0.5+ 10*0.2+5*0. 1= 13 14

90+408+7+ 10+5=520

haha

My idea is this: since the average value is greater than 2.5, we will use a lot of 10 blocks to narrow the gap between 13 14 and 520, and try again and again. 90 10 pieces,1314-90 *10 = 414,520-90 = 430,

That is to say, 430 yuan adds up to 4 14 yuan, and the problem has been simplified.

Then solve an equation set and it will be OK directly.