How to teach the second grade to know money

For single unit conversion, we use a nursery rhyme to teach students: big to small, long tail, just add 0; Small to big, tail off, remove 0 to grow up! (When small units become large units, let children associate tadpoles with frogs; when large units become small units, let children associate frogs with tadpoles. )

For example:

7 yuan = () Angle, from yuan to angle means that large units become small units, which is the "long tail". Just add a 0 after 7.

30 points = () angle, from small units to large units, just remove the tail 0! If there is cross-level conversion, conversion into yuan or yuan conversion component, then you can remove or add two zeros!

1-2 Small Ways for Students to Know Coins

Turn two units into one unit and one unit into two units.

In fact, it is very simple, as long as children remember which unit is big, which unit is small, and who is next to whom. (Simply put, it is the relationship between grandpa, dad and children)

Just add an adjacent unit bigger than yourself in the middle of two digits of a unit, or remove the big unit in the middle of two units.

For example:

1 yuan 3 angle = () angle, two units become one unit, and the conversion is realized by removing the large unit "yuan" in the two units.

28 points = () angle () points, one unit becomes two units, so split the two digits into large units and put them in small units. Or it is enough to add an adjacent large unit "angle" between 2 and 8.

1-2 Small Ways for Students to Know Coins

For the simple operation of RMB

Perform simple decomposition operations with both hands: addition and subtraction of elements, addition and subtraction of angles, and addition and subtraction of points.

For example:

3 yuan 5 Angle +4 yuan 3 Angle = () Yuan () Angle, press the number of the same unit with two fingers to operate. 3 yuan +4 yuan =7 yuan, 5 jiao +3 jiao =8 jiao, so the answer is 7 yuan 8 jiao. So is subtraction!

If the unit is missing, such as 7.6 points +2 angles = () yuan () angles, the unit "points" will be missing in the second addend. At this time, just tell the child to write 6 points, because 6 points have not been added or subtracted, so there is no change, just write them directly into the final score.

For the calculation of RMB, the subtraction of abdication should be the most difficult to understand! Many parents have explained the methods of changing angles and points to their children, but children still have some difficulties in conversion, so children often make incomprehensible conversion mistakes in the process of abdication.

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The following three methods:

1, hurdle method

For example:

5 yuan 3 Angle -2 yuan 7 Angle = () yuan () Angle, 3 Angle is not enough to minus 7 Angle? It doesn't matter, let the 1 little guy in 5 yuan "cross the hurdle" and cross the "yuan" to become the 1 in 4 yuan. Copy the last three corners and it will become the 13 corner in 4 yuan. Do a simple calculation!

Another example: 7 yuan -3 yuan 4 Angle = () Yuan () Angle, because "Yuan finds Yuan, Angle finds Angle, Point finds Point", but there is no "Angle" in 7 yuan, what should I do? First, turn 7 yuan into 7 yuan's 0 corner, then hurdle, then let a little guy in column 7 become 6 yuan 1, and copy the back 0 corner, so it becomes 6 yuan's 10 corner, and that's enough.

1-2 Small Ways for Students to Know Coins

In the process of hurdles, children must remember that only one child can hurdle, and one hurdle can't make everyone crowded, which is not only dangerous but also against the rules of the game. Children can firmly remember this. In addition, write the children's hurdles at the back of the hurdles and then copy down the remaining tails, so the difficulty of conversion is solved!

2, playing the monster method

Everyone knows that to defeat many monsters, you must defeat the big monsters before you can win! Therefore, when calculating the abdication of RMB, we can also use this method to beat the big monster away first, and then beat the small monster away.

For example:

5 yuan -4 yuan 3 Angle = () yuan () Angle, first use 5 yuan to subtract 4 yuan, leaving 1 yuan, and then use the remaining 1 yuan to subtract "Little Monster" 3 Angle, leaving 7 Angle. This method is not suitable for problems with large unit differences, because if there are more differences, there will be more left. It is generally used to solve the abdication subtraction calculation with the difference within 1 yuan.

3 Disassembling large unit method

This method is more suitable for children with the same abdication subtraction unit and good computing ability, because in previous studies, we already know that when converting large units into small units, we only need to remove large units.

For example:

7 yuan's 3-angle, when the large unit "Yuan" is removed, becomes 73-angle, so that the calculation of RMB can be converted into a subtraction calculation within 100 in the abdication subtraction calculation of the same unit.

3 angle 4 points-1 angle 7 points = () angle () points, remove the large unit into 34 points-17 points = 17 points, and finally into 1 angle 7 points. Because it needs to be converted twice, and children are not very familiar with subtracting two digits from two digits, so I don't recommend you to use this method very much. Just get to know it!

Here is a brief introduction to the methods of learning exercises such as "changing money".

To put it simply: look at how much money to change, how much money to change, and count with your fingers!

For example:

A ticket for 10 yuan can be exchanged for a ticket for () 2 yuan.

1-2 Small Ways for Students to Know Coins

Finally, we have to change it to 2 yuan's. how much is it? 10 yuan. So just two numbers, just count to 10. How many fingers are used, that is, how much money is used.

Since the face value of RMB is 5,2, 1, children only need to master one number, two numbers and five numbers! Just count the money you want to change at last. I spent a few RMB and a few fingers.

There is another kind of problem that may be troublesome. For example, a 5 yuan can be replaced by a 50-point one. Five dollars needs to be converted into 50 cents to be a finger.