According to the requirements in brackets, use the rounding method to approximate 1022.0099, where the error is () (a) 1022.01 (accurate to 0.01) (A) 1022.01 (accurate to 0.01) (b) 1.0 × 103 (2 significant digits reserved) (C) 1020 (to the tenth) (d) 1022.010 (to the thousandth) Why is option a wrong and why does option B keep two significant numbers instead of counting after the decimal point

According to the requirements in brackets, use the rounding method to approximate 1022.0099, where the error is () (a) 1022.01 (accurate to 0.01) (A) 1022.01 (accurate to 0.01) (b) 1.0 × 103 (2 significant digits reserved) (C) 1020 (to the tenth) (d) 1022.010 (to the thousandth) Why is option a wrong and why does option B keep two significant numbers instead of counting after the decimal point

A 1022.0099 ≈ 1022.01 (accurate to 0.01)
B yes
In scientific counting, just look at the number in front of the multiplication sign
For example, 3.80 × 10 & # 179; three significant digits
C wrong, 1022.0099 accurate to the tenth should be: 1.02 * 10 & # 179;, because accurate to the tenth is that you can't have numbers, so it is expressed by scientific counting method
D right

The accuracy and significant number of approximate number 0.0125 are pointed out. Let the largest significant number be x and the smallest significant number be y, and find the knot of (X-Y / 2) x-y-2
This paper points out the accuracy and significant number of approximate number 0.0125. Let the largest significant number be x and the smallest significant number be y, and find the value of (X-Y / 2) x-y-2

Then its accuracy is 0.0001, the significant number is 1, 2, 5, 3, the maximum is 5, the minimum is 1, and the result is 19.5

The quintic power of 5.47 times 10 is accurate. There are several significant numbers

The quintic power of 5.47 times 10 is accurate to thousands and has three significant numbers

(1) 67 × 10 to the fifth power___ Yes, there are____ A significant number. They are_________
(2) 3.45 accurate to_____ Yes, there are____ A significant number. They are________
(3) 25000 accurate to______ Yes, there are______ A significant number. They are

）67 × 10 to the thousandth power__ 3__ A significant number. They are___ 2、6、7______
(2) 3.45 accurate to___ Percent__ Yes, there are__ 3__ A significant number. They are__ 3、4、5______
(3) 25000 accurate to___ Thousand___ Yes, there are___ 2___ There are two significant numbers. They are two and five