2. Turn several scores into false scores. I can't tell you everything.

3、 15÷45=5/ 15= 1/3

4. Do the same as the above question. It's simple.

5. Three quarters = 4+3 Three quarters +3

6. As in the above question, the fraction and the molecule are enlarged by the same factor or reduced by the same factor. The numerator -8 in question 6 is equal to the numerator multiplied by 2/5, and so is the denominator.

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1, denominator plus 2 1. It is basically the same as the above question.

There is no need to say that everything is the same.

The denominator is also multiplied by 0.5.

P33

1, two consecutive nonzero natural numbers must be prime numbers. (√) (such as 2 and 3, 4 and 5 ...)

2. Two consecutive odd numbers must be prime numbers. (√) (Because there is always one or all factors, only 1 and itself. For example, 7 and 9, 7 only has 1 and itself, and the common factor is only 1)

Two consecutive even numbers must be prime numbers. (×) (Because even numbers have at least one 2 and another number besides themselves and 1. 0 is neither even nor odd)

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