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- Tell whether the number sentences below are true or false. Be ready to explain your thinking. You may use number lines or other strategies.
- 2 + 30 + 1000 = (3 10) + 1000
- 2074 = 2000 + 70 + 4
- 8000 + 900 + 40 + 6 = 8000 + 800 + 40 + 6
- 5045 = 5000 + 400 + 5
- 9000 + 600 + 70 + 8 = 9000 + 678
- Study the number line below.
- Do you agree that the number sentence below the number line is true?
- How does the sentence match the moves on the number line?
- Draw a number line to show that the following number sentence is true.
- Draw a number line to show that the following number sentence is a correct equation.
- Is a correct equation the same as a true number sentence? Why or why not?
- Tell whether the number sentences below are correct equations or not.
- 35 + 100 = (3 10) + 5 + 100
- 200 + 200 + 70 = 400 + 60 + 10
- 200 + 60 + 4 = 100 + 100 + 4
- (6 10) + 8 + 200 = (2 100) + 50 + 18
- (100 3) + 2 = 100 + 32
- Draw 2 number lines, one for each side of the equal sign, to show why your answer to Question 6D is correct.
