1, judging

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Step 2 fill in the blanks

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1, solve the problem

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Step 2 solve the problem

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This part of the extended information examines the knowledge points of the division:

Divide a number into several parts on average and find one of them; There are several other numbers in a number; Find a number by knowing its fraction or percentage; Find out how many times one number is another.

Integer A can be divisible by integer B, where A is called a multiple of B, and B is called a factor or divisor of A (within the range of natural numbers). Example: 6 ÷ 2 = 3, 1, 2, 3, 6 is a factor of 6. The factors of 6 are: 1 and 6, 2 and 3. The factors of 10 are: 1 and10,2 and 5. The factors of 15 are: 1 and15,3 and 5.

When calculating the greatest common factor or the least common multiple, the factor needs to be a prime factor. The former is the product of the prime factor on the left, excluding the final factor at the bottom; The latter needs to be multiplied by the final factor.