(2) In the following figures, (b) is not the simplest score.
a . 15 7 b . 9 6 c . 14 13
Note: 6/9=2/3
(3) If the reciprocal of a number is greater than itself, then the number (b)
A. greater than1B. less than1C. cannot be determined.
④ The greatest common factor of 8 and 12 is (4), and the smallest common multiple is (24).
Note: 8=2×2×2.
12=3×2×2
The greatest common factor is 2×2=4.
Least common multiple: 2×2×2×3=24
Two numbers are coprime, and their greatest common factor is 1 (right)
Note: refers to a natural number greater than 1, except for 1 and the integer itself, which cannot be divisible by other natural numbers.
Add 0 or remove 0 after the decimal point, and the size of the decimal point remains the same.
Note: The difference between adding zero and dividing zero lies in the same size, and the accuracy of change is 1.000 and 1.00. The former is more accurate than the latter to one thousandth of the decimal point, and the former is more practical.
The two numbers of coprime are numerator and denominator respectively, so this number must be the simplest fraction (right).
Note: refers to a natural number greater than 1, except for 1 and the integer itself, which cannot be divisible by other natural numbers.
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