At 50 months, 74.6% of children will recognize three kinds of coins. At 53 months, 76.8% of children will use 1 and 2 to make 5 points, or 1 and 5 cents to make 1 yuan. 78.2% children aged 5-6 learn the game of trading with coins.

Binet.Alfred stipulated that he could recognize four kinds of coins when he was six years old. In America, there are four kinds of coins: 1, 5, 1 and 25. Binet.Alfred L-M Scale stipulates that you should learn to change money at the age of 9, that is, you should change money within 35 minutes. Coins in our country are based on 10, which may be relatively easy, but it is also considerable to advance 3-4 years.

Step 2 reverse the numbers

Ask children to recite a series of numbers dictated by adults in reverse order, such as 32 1 when dictation 123. When reciting numbers, you are not allowed to look at the written numbers or write down the dictated numbers with your own hair pen. This requires children to pay great attention to listening, recite the numbers immediately, and think hard at the same time, that is, recite the order of the numbers backwards through reverse thinking. In the investigation of 1987, it is found that 8.5% of 4-year-old children and 72.5% of 5-year-old children can recite backwards. 7.4% of 5-year-old children, 74.5% of 70-month-old children and 98.5% of 76-month-old children can recite backwards. 1995 found that at the age of 4, 82% of people can recite two digits, 25% can recite three digits, 10.2% can recite five digits and 3.4% can recite six digits. Binet.Alfred's L-M Scale requires 3 digits for 7 years old, 4 digits for 9 years old and 5 digits for 12 years old. Only adults with high IQ can recite six figures. Webster's 1950 pointed out that repeating and reversing numbers is a way to measure intelligence.

Step 3 count down the seconds

Countdown is the countdown from big to small, such as 5432 1. Children who have learned to count down with nursery rhymes can count down from 10 to 1 from the age of three and a half. Children's songs rhyme smoothly:123,321,1234567,7654321. It's easy to learn to recite 7- 1, 10, 9 and 8 first. The key to the countdown is 10-9, such as key exercises 100-99, 90-89, 70-69. After practice, children can count down from the maximum number of times they remember to 1.