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Topic Two Journal

Topic Two Journal. 2-1 Mental Math. What kind of numbers do you find easy to add in your head (mentally)? Why do you think these numbers are easy to add mentally?. 2-1 Mental Math.

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Topic Two Journal

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  1. Topic Two Journal

  2. 2-1 Mental Math • What kind of numbers do you find easy to add in your head (mentally)? Why do you think these numbers are easy to add mentally?

  3. 2-1 Mental Math • Name and explain one of the 3 strategies from class and be sure to tell how that strategy helps you to add or subtract mentally.

  4. 2-2 Rounding Whole Numbers and Decimals • What do you know about rounding whole numbers? Be sure to include any helpful sayings that you have learned. How can you use this prior knowledge to round decimals?

  5. 2-2 Rounding Whole Numbers and Decimals • Using this number: 0.758, explain, step-by-step, how you would round to the nearest hundredth.

  6. 2-3 Estimating Sums and Differences • How do you think rounding can help you estimate a sum or difference?

  7. 2-3 Estimating Sums and Differences • Golden Gate Park is located in San Francisco, California. The park covers 1,017 acres and has been compared to the size and shape of Central Park in New York City. Central Park covers 843 acres. About how many more acres does Golden Gate Park cover than Central Park?

  8. 2-4 Draw a Picture and Write an Equation • Brainstorm…What kind of pictures have you drawn when doing Math?

  9. 2-4 Draw a Picture and Write an Equation • A museum is 39 miles from Marco’s school. The class leaves for the field trip at 8am. After traveling for 17 minutes and 15 miles the driver of the bus got caught in traffic. How many more miles are left to travel to the museum? Draw a picture to solve and explain what your picture is representing.

  10. 2-5 Adding and Subtracting • Why do you think it is important to line up numbers before adding and subtracting?

  11. 2-5 Adding and Subtracting • Write a step-by-step explanation describing how to add and subtract whole numbers. • The person you are explaining to has never done this before so make sure you are clear with your explanation.

  12. 2-6 Adding Decimals • Using what you know about adding and subtracting multi digit whole numbers, predict what you need to do to add decimals.

  13. 2-6 Adding Decimals • Add 6.9 + 2.81. Explain why it is important that we need to line up the decimals before adding our numbers.

  14. 2-7 Subtracting Decimals • Why is it important to estimate your difference before you begin to solve?

  15. 2-7 Subtracting Decimals • Kevin subtracted 2.9 from 20.9 and got an answer of 1.8. Is Kevin’s answer correct? Explain why or why not.

  16. 2-8 Multiple Step Problems • Think of a time when you had to solve/answer a smaller problem before you could get your final solution. When did this happen? Why did you have to solve your problem in more than one step? • Your example does not have to be from Math class.

  17. 2-8 Multiple Step Problems • The table shows the amount of lunch meat a deli had on Monday morning. During the day, they sold 5 lbs. of turkey, 16 lbs. of salami and 14 lbs. of ham. How many total pounds of lunch meat did the deli have left on Monday night? Explain your work. Lunch Meat Inventory

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