Rounding is an accurate counting retention method, which is essentially the same as other methods. But the special point is that rounding can make the difference between the reserved part and the actual value not exceed half of the last order of magnitude. If there is a probability of 0 ~ 9, the total error of this retention method is the smallest for a large number of retained data. This is probably why we regard this method as the basic reservation method.
Question 2: How to calculate the approximate number of mathematical multiplication formula in the third grade of primary school? For example, what is 148x2? 148 times two equals 296. If you want to approximate, change 148 into 150, which is 300. As long as one of the two multiplied numbers is rounded off, the answer will be similar to the correct answer.
Question 3: What is the primary multiplication 18×4? 18x4≈20x4=80
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Question 4: What don't you want to do in the formula multiplication of the third grade in primary school?
Question 5: What is the mathematical multiplication 12x0 equal to or equal to 0?
Question 6: Is there a multiplication equal to about? Usually not. If you want to keep a few decimal places, you should use about equal.