1 yuan +7 jiao = several yuan and several jiao. The answer is 1 yuan.70.

1 angle +2 points = several angles. The answer is 1 2 cents.

1 RMB 3.5 +3 yuan 7.6.

1 yuan = 10 angle = 100 point.

30 yuan =300 Angle =3000 points.

In arithmetic

The addition rules involving fractions and negative numbers are designed. Addition has several important properties. It is interchangeable, which means that the order is not important, it is interrelated, which means that when more than two numbers are added, the order in which the addition is performed is not important. Repeatedly adding 1 is the same as counting; Adding 0 will not change the result. Addition also follows related operations such as subtraction and multiplication.