For the mixed operation problems of multiplication, division and addition and subtraction, multiply and divide first, and then add and subtract; For the test questions in brackets, the operation in brackets should be calculated first. The correct operation sequence must be followed here, rather than taking simplicity as the standard.

Some formulas, on the surface, can be rounded up in one step, so calculate first. For example, 32+68× 14 seems to be simple to calculate the addition first, so you will forget the operation order, and calculate the addition first and then the multiplication.

The help of mathematical mind map to mathematics learning in grade three.

Mathematical mind map summarizes and analyzes the knowledge of each chapter of junior three mathematics. Besides summarizing basic concepts, learning methods and problem-solving skills, the highlights of key and difficult contents are also constantly reminding everyone to pay attention to these key contents.

At the same time, strengthen the connection between knowledge points, so that students can master knowledge as a whole in their study. This structural learning mode can save students a lot of time and is a good choice in study and review. The interlocking knowledge points and gradual progress can improve students' thinking ability.