Calculate and say the meaning of each step in the vertical form.

Vertical type: vertical type refers to a vertical formula in the calculation process, which makes the calculation simple.

add

The same numbers are aligned. If the sum exceeds 10, it will move forward to 1. (The numbers should be aligned. ) such as:

435

+697

———

1 132

subtraction

If the same number is aligned, borrow 1 from the previous number as 10 if it is not reduced enough. For example:

756

-569

————

187

increase

The i-th bit of one number is multiplied by the j-th bit of another number.

It should be added to i+j- 1 bit of the product.

As for what you said, "it's already passed 10", that's not important. Just lift it up.

separate

For example, 42 divided by 7.

On a scale of 4 [from high to low]. When calculating the division vertically, start from most significant bit, such as: 42 from most significant bit 4; If it is not divisible, such as: 4 is not divisible by 7, then use the highest bit and the next bit to synthesize a number to be divisible until it can be divisible by the divisor; For example, if 4 is not divisible by 7 in 42, then 4 and 2 are combined into a number. If 42 is divided by 7, the quotient is 6.