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Is there an order in the expressions of addition and subtraction in senior one mathematics?
Only addition and subtraction or only multiplication and division (without brackets) should be in the order from left to right.

For the first-grade pupils, it is difficult to understand the meaning of math problems, and the problem of picture form is even more obscure. It is necessary to cultivate the ability of thinking and understanding the meaning of problems through continuous practice.

As shown in the figure below, these two pictures are the decomposition of a picture. Look at the left half first. A * * * has seven balls, three of which are carried away by Xiaohua. Subtract "7-3" Later, Xiao Ming brought four more balls, which means adding four more balls on the basis of the four balls left in the first picture. The formula should be "7-3+4 = 8".

In other words, a question like this, don't look at the two pictures separately, it is actually two different pictures of one picture.

Only by watching more and practicing more can children's ideas really get through. Children are different from adults, and knowledge is difficult from scratch. Parents should change their teaching methods and teach patiently when explaining.