I have a pair of hands, representing ninety-nine; Set the left hand to ten, and I can count to ninety;

Pose your right hand and count from one to nine; It's convenient to add and subtract, so don't worry about calculation.

2, hand index formula

The index finger extends "L" and the middle finger extends "2";

The ring finger is "3" and the little finger is "4";

Four fingers and a thumb, the thumb is "5" to remember;

Then extend the index finger to the little finger, and "6", "7", "8" and "9" are arranged in numbers.

3. Practice the formula with your right finger.

Take the lead, two tigers contend, in a few words, the four seas are at home, and the grain is abundant.

Six animals are thriving, and the eight immortals are crossing the sea, and nine Niu Yi hairs are urgent.

A word nine, two dragons playing with pearls, three pillars separated, surrounded by enemies, the grain is abundant.

Six gods without a master, seven ups and downs, exquisite, nine Niu Yi hairs, perfect.

(Note: When reading "urgent" or "perfect", make a fist in your right hand and put "1" in your left hand, indicating carry. )

4, the left hand refers to the formula.

Ten, twenty, thirty, forty; Fifty,

Sixty, seventy, eighty, ninety, one hundred.

(Note: When reading "100", clap your hands and put your fist on your chest.)

Step 5 practice counting with both hands

15、23、46、99、58、73、6 1?

(Note: Choose the size of the number according to the cognitive level of children of all ages)

6. Addition practice

Note: When doing addition exercises, such as "3+5", the right hand will give out "3" first, and the process of "+5" is: say "plus 1" in your mouth and extend your little finger; Say "plus 2" in your mouth and stretch out your thumb with four fingers (note that the thumb only represents "1" in the process of pointing out, and the thumb is only regarded as "5" when deciding the number); Read "plus 3" in your mouth and stretch out your index finger; Read "plus 4" in your mouth and stretch out your middle finger; Say "plus 5" in your mouth and extend your ring finger. At this time, counting began, only the little finger of the right hand did not open, and the result was "8".