First, add up to ten formulas.

Song of the number 1 and 19 19: When you see 9, you think of1; When you see 8, you think of 2; When you see 7, you think of 3; When you see 6, you think of 4; When you see Osuka decimals, you first add them to ten.

2. Song of "2828": When you see 8, you think of 2; When you see 7, you think of 3; At 28 points, you have to divide the remaining half, and a bundle of sticks is indispensable.

3. The release song of "3737": I think of 3 when I see 7; When you see 9, you think of1; Counting three bundles of sticks; If one bag is missing, you should borrow one first.

Second, break the ten-law formula

Borrow the songs of 1 and "minus nine plus one": think of1when you see 9; When you see 8, you think of 2; When you see 7, you think of 3; When you see 6, you think of 4; Greatly reduced; Borrow a few if you are short.

2. Complement song of "Minus Eight Plus Two": When you see eight, you think of two; When you see seven, you will think of three; Reduce the small amount, you can calculate the difference, and you will be in front of the big one.

3. The song "Minus Seven Plus Three": When you see 7, you think of 3; When you see 9, you think of1; When the big ones make up for the small ones, the difference is calculated, ranking ahead of the big ones.

Third, the application of the formula of breaking ten

The formula of breaking ten laws can help children quickly understand and master the calculation method of breaking ten laws. By practicing and memorizing these formulas repeatedly, children can gradually master the skills of breaking ten methods and improve the calculation speed and accuracy.

Fourth, matters needing attention

1, understand the meaning of the formula.

While memorizing the formula, we should also understand its meaning and calculation method to avoid mechanical memory.

2. Practice more.

Only through a lot of practice and application can we really master the skills of supplementing ten methods and breaking ten methods.

Ten Methods and Mathematical Thought and Ten Methods and Arithmetic Basis

1, the method of adding ten and mathematical thinking

Ten times ten is a method to divide numbers into easy-to-calculate combinations. By using the formula of the sum of ten, students can quickly split and combine numbers into easy-to-calculate numbers, thus improving the calculation speed and accuracy. This method plays an important role in cultivating students' mathematical thinking. It is helpful for students to master the rules and skills of numbers and improve the efficiency of solving mathematical problems.

2. Breaking Ten Method and Arithmetic Foundation

Breaking ten is a method to convert the subtraction of two digits into the subtraction of ten digits and single digits. By applying the formula of breaking ten, students can quickly solve the problem of two-digit subtraction and improve the calculation speed and accuracy. Breaking ten methods is an important content in elementary school arithmetic education, which helps students master basic subtraction calculation skills and lays a solid foundation for subsequent mathematics learning.