文档介绍：Math 302A
Section 7
Spring 2007
Practice with decimals
Interpreting Decimal numbers
1. How are decimals related to integers? What are the similarities between the two? (Think about place value; how are different place values named?)
2. In which of the following numbers is writing 0 necessary, and in which is it optional:
; ; ; ; ?
3. A child is asked to add + using blocks and to write down his answer. He uses rods for tenths and cubes for hundredths. For he puts down two tenth rods and 5 hundredth cubes. For he puts down 6 hundredth cubes. Combining these together he says, “it is two tenths and 11 hundredths”, and writes down . What would you say to this child?
4. Interpret the following problems. What is the decimal in question? What do you think would be mon incorrect responses to these problems?
1) 38 hundredths
2) 123 ten-thousandths
3) 13 tenths and 76 thousandths
4) 450 hundredths and 125 ten-thousandths
5) 150 thousandths and hundredths.
5. Use manipulatives to determine which decimal number is larger
1) 52 hundredths or 731 thousandths
2) tenths or tens
6. For each of the expressions, answer if it is true or false without converting fractions to decimals. Explain your answer:
1) 2/3>
2) 5/11>
3) 8/17<
4) 3/5<
5) 5/9<.
7. Express the following decimal as indicated. W