analyse

According to the significance of integer subtraction within 10, a * * * has 10 turtles, and four turtles are removed, that is, the four turtles removed are subtracted from the total number of turtles, that is, 10-4=6 (only).

Subtraction techniques within ten are:

Subtraction: remember large numbers and decimal numbers, such as 6-3=? Remember 6, count down to 3, 5, 4, 3 and the result is 3.

See graphic calculation skills:

1, as appropriate:

First of all, guide students to find mathematical information and gradually ask them to express it in language. After some training, let the students find out the math problems they want and express them in words. Finally, lead the students to fully express the mathematical information expressed in each picture and the required mathematical problems.

2. Braces and parentheses:

This kind of question has braces and small question marks to remind you and make it clear what the question is asking. Show two different types of questions, and let the students focus on the position of the question mark to see if the braces refer to numbers or question marks.