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Several multiple choice questions about multiplication and division of rational numbers 1. The wrong one in the following statement is () A. If a number is multiplied by 0, it still gets 0 B. If a number is multiplied by 1, it is still the original number C. A number multiplied by - 1 yields the opposite number of the original number D. the product of opposite numbers is 1 2. If the product of two numbers is negative and the sum is also negative, then the two numbers () A. They are all negative numbers. B. they are opposite numbers C. One positive and one negative, and the absolute value of negative number is larger. D. one positive and one negative, and the absolute value of negative number is smaller 3. If the sum of two rational numbers is zero and the product is zero, then the two rational numbers () A. At least one of them is zero, not all of them. B. both numbers are zero C. It doesn't have to be all zero, but it must be opposite to each other 4. If the product of two numbers is zero, then the two numbers () A. All equal to zero B. at least one is zero C. One is equal to zero and the other is not equal to zero 5. Multiplication of a rational number by its opposite number, product () A. It must be a positive number B. it must be a negative number C. Must not be greater than zero D. must not be less than zero 6. If the product of two rational numbers is less than zero and the sum is greater than zero, then the two rational numbers () A. Opposite sign B. opposite sign, equal absolute value C. The sign is opposite, and the absolute value of negative number is larger. D. the sign is opposite, and the absolute value of positive number is larger
1: The product of opposite numbers is 1
2: C. one positive and one negative, and the absolute value of negative number is larger
3: Both numbers are zero
4: B. at least one is zero
5: B. it must be negative
6: D. the sign is opposite and the absolute value of positive number is larger
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