The key to the first grade question is that I didn t learn multiplication and division! Knocked me o

The first question, to analyze how many 5 corners are in 5 yuan, there are two 5 corners in one yuan, then there are 10 5 corners in 5 yuan, you can break the number of fingers;

The second question, one kilogram of green pepper is 3 yuan 5 jiao, then two kilograms of green pepper is needed two three yuan 5 jiao, 1 yuan is equal to two 5 jiao, then two 3 yuan 5 jiao is 3 + 3 + 1 7 yuan.

In fact, a considerable number of people are always bound by their own knowledge and cannot jump out of the box of their own knowledge. First of all, we must understand that the so-called multiplication is actually a simple algorithm for addition. If we forget to add because we learned multiplication, it's a bit undeserved.

1. Cabbage 5 jiao a catty, now we have 5 yuan, that is, there are 10 5 jiao, there is no need to use multiplication to know that 10 5 jiao is 5 yuan. In fact, addition is also possible. Knowing that 5 yuan is 10 5 jiao, a 5 jiao can buy 1 catty of cabbage, and 10 5 jiao should be able to buy 10 1 catty cabbage.

That's 10 pounds.

2. I think the above methods should also be used to explain clearly to children.

This multiplication and division is the foundation, and it is recommended that you learn the ninety-nine multiplication table. Get started quickly. It's useless not to learn this and tell you the answer.

5 yuan is 50 jiao. cabbage 5 jiao a kilogram. 5 yuan is able to buy 50 5 = 10 kilograms.

3 yuan 5 jiao is 35 jiao. The fruit is 35 jiao a kilogram. To buy 2 kilograms is 35 2 = 70 jiao, which is 7 yuan.

The first: it is possible to buy 10 kgYuan = 50 jiao.

5+5+5+5+5+5+5+5+5+5+5+5=50 (corner), so you can buy 10 kg.

The second: It costs 7 yuanYuan 5 jiao = yuan.

5+ yuan), so it takes 7 yuan.

Because 5 jiao can buy 1 kg of cabbage, 5 yuan = 10 sheets of 5 jiao, so 5 yuan can buy 10 kg of cabbage, 5 + 5 = 10 (kg).

3 yuan 5 jiao + 3 yuan 5 jiao = 7 yuan, yuan.

10 pieces of 5 jiao 5 yuan.

2 pieces of 3 yuan, 5 jiao, 7 yuan.

This question is a test of the child's comprehensive practical ability, and does not need to be solved by division.

The answer is 7 yuan, 3 yuan, 5 jiao plus 3 yuan, 5 jiao is equal to 7 yuan.

First of all, multiplication is the foundation, and it is necessary to start to be multiplied by the formula table.

Yuan = 50 jiao.

50 5 = 10 (kg).

A: You can buy 10 kg of cabbage.

A: It takes 6 yuan.

First question: One yuan is equal to ten jiao, five times ten is equal to 50 jiao, 50 5 10 kilograms.

Second question: 30 5 35

2 35 70 jiao 7 yuan.

The first empty 10 kg.

The second empty $7.

You teach you! Multiplication, division, addition and subtraction are all available, it's very simple.

Yuan (yuan) big Answer: It costs 7 yuan to buy 2 kilograms.

Let's change multiplication to addition and talk about it.

The first empty 10

The second empty 7

Answer the first question 10 kg.

The second answer is 7 yuan.

5 yuan = 50 jiao.

5 Jiao 10 5 Jiao 10 5 Jiao 10 5 Jiao 10 5 Jiao 10 5 Jiao 10 5 Jiao 5 Jiao 10 Jiao 5 Jiao 5 Jiao = 50 Jiao.

There are a total of io 5 corners.

You can buy cabbage io kilograms.

3 yuan, 5 jiao, 10, 3 yuan, 5 jiao=7 yuan.

It costs 7 yuan to buy 2 catties of chili peppers.

5 yuan = 5 jiao + 5 jiao + 5 jiao + 5 jiao + 5 jiao + 5 jiao + 5 jiao + 5 jiao + 5 jiao + 5 jiao + 5 jiao (there are 10 corners in 5 yuan).

5 yuan can buy 10 kilograms.

2 kg = 1 kg + 1 kg.

3 yuan 5 jiao + 3 yuan 5 jiao = 7 yuan.

1) 5 yuan can buy 10 kg of cabbage.

2) Seven dollars are required.

Because 5 jiao can buy 1 kilogram of cabbage, 5 yuan has 10 5 jiao.

So 5 yuan can buy 10 kg of cabbage.

3 yuan 5 jiao + 3 yuan 5 jiao = 7 yuan.

1 yuan = 10 jiao.

One yuan can buy 2 kilograms of cabbage.

5 yuan can buy 5 pieces of 2 kg: 2 + 2 + 2 + 2 + 2 = 10 kg.

I don't learn multiplication in the first grade of elementary school, but I start learning multiplication in the second grade. The main contents that first-year students need to learn and master are:

Count up to 100.

2.Proficient in the formation, addition and subtraction of numbers within 20.

3.Recognize common geometric shapes such as: squares, rectangles, triangles, circles, cubes, cuboids, cylinders, etc.

4.Recognize the clock face and know simple moments, such as: what time is it, what time is it, and so on.

5.Get to know the renminbi denomination, dime and cent.

The difference between the two = 12-8 = 4 (sheets).

Because 2+2=4

Therefore, Cong Cong should give Ming Ming 2 sheets.

With the substitution method, you can use some objects to represent people, which is simple and clear.

2 people 8 + 4 = 12

12 divided by 2 = 6

So 6 people on each side.

You can draw a picture to help him understand the meaning of the question, and then come up with an equation.

Lingling stands in the middle, indicating that there are as many people on Lingling's left as there are on her right. Lingling walked over to the left with 2 people, and there were 6 people left on the left. There are 2 more people on the right to make 6 people.

This question tests the student's counting ability, where counting requires 3 numbers of 3, that is:

There are 17 people in total] So I counted 6 numbers, and at least 6 units are needed.

If you don't understand, please ask!

First computer: 17-3=14 (number left).

Second computer: 14-3=11 (number left).

Third computer: 11-3=8 (number left).

Fourth computer: 8-3=5 (number of people left).

Fifth computer: 5-3=2 (number of people left).

The remaining two also need one, that is, 6 units.

A minimum of 6 computers is required.

17-3-3-3-3-3-3 = 2 people.

In other words, 5 units will be used.

Then the remaining 2 people also need to use it, so it's 5+1=6 units.

A group of 3 people, 5 groups of 3 people and 2 more people, that is, 5 combinations of 5 computers are needed, and the other two share a computer, at least 5+1 6 units are needed.

Divide 17 by 3 to approximate the same.

Because the rest can't do without. So there is one more.

6 units are required.

17 divided by 3 = 5 and 2

So 6 units are needed.

17 divided by 3 = 5 (Taiwan) · · 2 (sets).

5+1=6 (sets).

Standard answer.

The fourth question is added, each cage has three birds, and four cages are 3+3+3+3=12. The fifth question is subtracted, subtracted all the time, and after the subtraction, it is enough to count and subtract a few times. However, in the first grade, there may not be addition or subtraction, but addition and subtraction are separated, and one formula is added or subtracted once.

Draw a grid, six grids (radishes in the grid) one line, four lines on the line, isn't this how the teacher taught?

The first one is with addition, 3+3+3+3=12

The second question uses subtraction, 24-6=18,,18-6=12,12-6=6,6-6=0, subtracting 4 times is equal to zero, so move 4 times.

If you move 6 at a time, you will lose 6, and if you 24, you will subtract 6, this is one time, and then count slowly.

Let's buy x apples.

Half x + quarter x + 2 = x

x=8A: Mom bought 8 apples.