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Fill in the math box.
There are no rules for the topic, just fill it in casually to avoid repetition.

In fact, this problem is a fill-in-the-blank problem in primary school mathematics. The original title is: □ +□ =□ +□ = □ +□ = □ +□

The answer is: 0+9= 1+8=2+7=2+6=4+5.

Analysis: The sum of every two boxes in the title is the same. This technique combines the largest number with the smallest number, then combines the second largest number with the second smallest number, and so on.

Law of addition:

When using "truncation method" in addition and subtraction, add and subtract directly from the upper left bit (and pay attention to whether the next bit needs carry and dislocation) until you get the answer with required accuracy. When using truncation method in multiplication or division, in order to make the result as accurate as possible, we need to pay attention to the direction of truncation approximation:

First of all, to expand (or shrink) a multiplier, we must shrink (or expand) another multiplier.

Second, to expand (or reduce) the dividend, you need to expand (or reduce) the divisor. If it is the sum or difference of two products (that is, a*b+/-c*d).

Third, expand (or shrink) one side of the plus sign. You need to shrink (or expand) the other side of the plus sign.

Fourth, to expand (or shrink) one side of the minus sign, you need to expand (or shrink) the other side of the minus sign.