tailieunhanh - Math test english 9

Tham khảo tài liệu 'math test english 9', ngoại ngữ, anh ngữ phổ thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | ACT MATH TEST PRACTICE Practice Questions Answers and Explanations 1. Choice a is correct. The word and indicates a decimal point. Therefore the decimal point should go after five hundred twelve and before sixteen thousandths. The number 16 must end in the thousandths place which is three digits to the right of the decimal. The correct answer is . Choice b is five hundred twelve and sixteen hundredths. Choice c is five hundred twelve thousand one hundred sixty. Choice d is fifty one and two hundred sixteen thousandths. Choice e is five hundred twelve and sixteen ten thousandths. 2. Choice f is correct. First change the fractional parts of the problem to have the common denominator of 12. 4ĨT - 1ầ Subtract the numerators. Since 4 is less than 9 you must borrow one whole from the whole number 4. This means that you are adding -11 to the first fraction. 3if - 14 Subtract the fractional parts then the whole numbers. The final answer is 2 71. 3. Choice b is correct. The correct order of operations must be used to simplify the expression. You may remember this as PEMDAS or Please Excuse My Dear Aunt Sally. The P stands for parentheses or any grouping symbol. Absolute value is a grouping symbol so it will be done first. -8 4 X 23 8 4 X 23 Next perform the exponent part. 8 4 X8 Then the multiplication. 8 32 Last the addition. The final answer is 40. 4. Choice g is correct. This problem can be approached a couple of different ways. The simplest way might be to look at multiples of 4 and 5 until the multiples add to 18. If both 4 and 5 are multiplied by 2 they become 8 and 10. 8 plus 10 is 18. Therefore there are 8 boys and 10 girls in the class. The problem can also be done with an equation. 4x 5x 18 When solved x 2. Multiply 4 by 2 to find that there are 8 boys. 184 ACT MATH TEST PRACTICE 5. Choice c is correct. To find the median place the numbers in order from least to greatest and find the middle number. In order the numbers are .

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