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Tips to teach children the tips of addition and subtraction mental arithmetic skills of addition and

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Tips to teach children the tips of addition and subtraction mental arithmetic skills of addition and subtraction within 100

What are the tips and tricks for pupils to learn addition and subtraction? What are the learning methods and skills for addition and subtraction within 100?

Tips for teaching children addition and subtraction

1. Digital painting

Taking 7 + 2 = 9 as an example, deform the number symbols in the formula and add some creation. A calculation problem becomes a mouse.

Use the way of drawing to turn abstract numbers into vivid pictures,

For children, when they first contact the addition and subtraction method, they can use this method to arouse their interest.

2. Lego blocks

Lego building blocks have the advantage of evenly distributed convex points on the surface. When children first learn addition and subtraction, they can get the results after counting the number of convex points.

At the same time, the color of the building blocks themselves is bright. Using building blocks of different colors to represent different quantities will look more intuitive and convenient for children to identify.

3. Clock

Many parents are surprised to see the clock and think that their children don't even know time. How can they learn addition and subtraction from the clock?

At the beginning, only the hour hand is left, and the minute hand is removed. By changing the position of the hour hand, we can understand the time point and understand the concept of morning, middle and evening.

Addition and Subtraction Skills for pupils within 100

Pithy formula: add 9 to subtract 1, add 8 to subtract 2, add 7 to subtract 3, add 6 to subtract 4, add 5 to subtract 5, add 4 to subtract 6, add 3 to subtract 7, add 2 to subtract 8, add 1 to subtract 9( Note: the addition in the oral decision is the number on a single digit)

Example: 26 + 38 = 64 solution: add 8 to subtract 2, who subtracts 2? 6 minus 2 on 26. Three out of ten in 38 will go into four.

(Note: how to carry the ten digits in the last two digits, i.e. 1 into 2, 2 into 3, 3 into 4, and so on. Where do you carry it? It's in the second two digits and ten digits. If this is 3, I get 4, which is 2 + 4 = 6 in these two double digits.) Here, 26 + 38 = 64 means that 6-2 = 4 is written in one bit, and 3 into 4 plus 2 is equal to 6 written in ten bits.

Another example is 42 + 29 = 71. Add 9 to subtract 1, 2-1 = 1, write 1 in one bit, it is 2, I enter 3, 4 + 3 = 7, and write 7 in ten bits to get 71.

For the addition of two digits plus two digits without carry, just write the number directly. For example, 25 + 34 = 59, one digit plus one digit is written on the one digit after the equal sign, 5 + 4 = 9, ten digit plus ten digit is written on the ten digit, and 2 + 3 = 5, i.e. 59. Vertical calculation is not necessary.