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Math problem for pupils 100 Ten mouths x3 two 1000: What should be in your mouth?
If you don't learn equations, the idea of solving problems is as follows.

Port X3 = Port A.

100+ port A= 1000

Then port A=900.

X3=900

Mouth =300

Fill your mouth with 300 yuan

If you learn the equation, it will become simple.

100+3x= 1000

3x= 1000- 100

3x=900

x=300

Equation solution:

1, without brackets

2. Move items

3, the signal coefficient 1

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