Finger counting math video tutorial kindergarten

Finger math kindergarten tutorials are as follows:

The right hand clenches a fist to indicate 0, and in turn extends the index of the index 1, the index of the middle 2, the ring finger to count 3, the pinky on the number of 4, to retrieve the four fingers, and then extends the thumb on the number of 5.

Then extends the index of the index of the index of the index of 6, the index of the middle 7, the ring finger to count 8, the pinky on the number of 9, the 10 words, and so on can always count to 99, addition is to count backwards. 10 words, the left hand extends 1, the right hand into a fist to indicate 0, is 10, and so on can be counted up to 99, addition is along the number, subtraction is to count backwards.

Example: 2 + 3, the right hand extends the index finger and middle finger, said 2, plus 2 is, from extending the ring finger to start counting 1, extend the small index 2, take back the four fingers, extend the thumb to count 5, the answer is 5. Full 10 to be rounded up, that is, to extend the left index finger into the ten.

Finger speed algorithm is by Xi'an's Mr. Niu Hongwei research and development of a speedy calculation method, is a kind of mathematical operations without the abacus. People always do calculations by writing or with the help of other calculators (e.g., abacus, computer, etc.).

The mnemonic for right hand out finger practice is two tigers fight first, two tigers quarrel, four seas for home, five grains are abundant, six beasts prosper, eight immortals cross the sea, nine oxen and one hair, one hundred thousand hurry. In a word, nine tripods, two dragons fighting beads, three legs standing tall, singing on all sides, five valleys are fruitful, six gods and goddesses, four sides, nine oxen and one hair is perfect.