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It is several times, several times more, many times more ~

Public number: Cashew nut test Qi Lin Source: Time: 2020-02-21 01:33:07

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的多少倍 VS 增长了多少倍 (A比B多几倍) How many times A is B vs. how many times it has increased (A is several times more than B )

I don't need the real question this time. I will simply give simple data for explanation. I believe that many students often make mistakes:

年,小齐月薪1500元; 2015年小齐月薪500元; [Example 1] In 2016 , Xiao Qi received a monthly salary of 1,500 yuan; in 2015 , Xiao Qi received a monthly salary of 500 yuan;

年,小齐月薪是2015年的多少倍? Question 1: How many times is Qi Qi's monthly salary in 2016 ?

的多少倍,列式A ÷ B1500 ÷ 500=3倍,即2016年月薪是2015年的3倍。 Answer: How many times A is B , the formula A ÷ B , 1500 ÷ 500 = 3 times, that is, the monthly salary in 2016 is 3 times that in 2015 .

年,小齐月薪比2015年增长了多少倍? Question 2: How many times did Qi Qi's monthly salary increase in 2016 compared to 2015 ? 年的同比增长率) (Equivalent to the year-on-year growth rate in 2016 )

100% 时常表述为增长多少倍。 Answer: How many times the increase is a question of growth rate. When the growth rate is greater than 100%, it is often expressed as how many times the increase. 1500 500 )÷ 500 2 ,即 2016 年小齐月薪比 2015 年增长了 2 倍(或增长了 200% )。 Since the growth rate is calculated, according to the formula of growth rate, (current period-base period) ÷ base period, ( 1500-500 ) ÷ 500 = 2 , that is , the monthly salary of Xiaoqi in 2016 increased by 2 times (or increased by 200) % ).

的多少倍,直接除( A ÷ B );增长了多少倍,就是算增长率,先减再除(当然,也等于现期÷基期— 1 ,不推荐这么记忆)。 Memory method: how many times A is B , divide directly ( A ÷ B ); how many times it is increased is calculated as the growth rate, and then subtracted and then divided (of course, it is also equal to the current period ÷ base period- 1 , this memory is not recommended).

A B 多多少倍,等同于增长了多少倍的问法,( A B )÷ B 即可。 Supplement: How many times A is more than B is equivalent to the question of how many times it has increased, ( A - B ) ÷ B.

Expansion: What the hell is 1 minus 1?

It is known that wages in 2016 have increased by 60% compared to 2015. How many times are wages in 2016 equal to 2015?

Answer: How many times A is B, the column formula A ÷ B, 2016 ÷ 2015, that is, current period ÷ base period, isn't it equal to (1 + growth rate)? (Doesn't the current period ÷ (1 + growth rate) equal the base period, but the current period ÷ base period = 1 + growth rate), so the salary in 2016 is (1 + 60%) = 1.6 times that in 2015.

Summary: the multiple relationship of the current base period = growth rate +1

Exercise 1:

It is known that wages in 2016 have increased 2.3 times compared to 2015. How many times are wages in 2016 equal to 2015?


God Zhao Yun

Analysis: The growth rate is 2.3 times the growth (230% growth), so 2016 ÷ 2015 = (1 + growth rate) = 1 + 2.3 = 3.3, and the salary in 2016 is 3.3 times that in 2015.

Exercise 2:

Knowing that A is 3.3 times more than B, how many times is A more than B?

Analysis: 3.3 times more, similar to 3.3 times growth, so A ÷ B = (1 + growth rate) = 1 + 3.3 = 4.3, A is 4.3 times that of B.

The big summary: only A is how many times (for) B is the multiple calculation, the growth is XX times, more XX times, and more are used as the growth rate ~

After all, what should I do?

Cashew Examination Qi Lin (ygqilin)


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