The kindergarten math formula 8 plus 7Calculating 8 plus 7 could be done using the Ten Method. 8 to 2 was 10, then 8 + 7 = 8+(2 + 5)=(8 + 2)+5 = 10+5 = 15, or 7 to 3 was 10, then 8 + 7=(5 + 3)+7 = 5+(3 + 7)=5 + 10 = 15.
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Math skills in kindergarten, plus and minus, within 100Children in kindergarten shouldn't be limited to addition and substitution. However, if you want to learn addition and substitution skills within 100, you can try the following methods:
1. ** Using physical objects **: Children aged 2 - 7 years old are in the early stage of computing ability. Their thinking is mainly based on concrete images and is in the transition to mathematical logic thinking. He could learn addition and deduction with the help of concrete objects, transforming abstract numerical operations into physical operations that could be seen and touched.
2. ** Number division and combination **: Just like how primary school students memorize the multiplication formula, let the child memorize the division and combination of numbers, which will help with addition and substitution. For example, in the addition and substitution method within 100, the basis was the division and combination of numbers within 10. For example, when calculating 69+6, if you saw that the 69 digits were 9, you would split the 6 into 1 and 5 (because 1 and 9 could be rounded up to 10). First, you would calculate 69+1 = 70, then 70+5 = 75. Subtraction works the same way. For example, 65 - 8. Dividing 8 into 5 and 3, it becomes 65 - 5 - 3 = 60 - 3 = 57.
3. ** Counting up and down **: Children can start counting from 1 to 10 when they learn to speak at the age of 1. In addition and substitution, one could use the upward (addition) and downward (substitution) methods. For example, if you want to calculate 3 + 2, you can start from 3 and count up to 2 to get the result.
It was important to note that the guidelines issued by the Ministry of Education pointed out that kindergarten children could learn arithmetic problems, but they only needed to learn addition and substitution within 10. The mathematical cognition of kindergarten children should also include space, geometry, measurement, patterns, and other cultivation content related to number sense.
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