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Numerical Expressions

Numerical Expressions. I can write simple expressions that record calculations with numbers . 5.OA.2. Today’s Objective: 1. Write simple expressions that record calculations with numbers. 2. I nterpret numerical expressions without evaluating them.

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Numerical Expressions

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  1. Numerical Expressions I can write simple expressions that record calculations with numbers. 5.OA.2 Today’s Objective: 1. Write simple expressions that record calculations with numbers. 2. Interpret numerical expressions without evaluating them. I know that expressions are a series of numbers and symbols.

  2. We have to be able to “translate”words into expressions What words indicate a particular operation? Table Talk with your group! Timer Add Subtract Minus Take away Difference Reduce(d) by Decrease(d) by Less than Fewer (than) Sum Plus More than Increase(d) by Greater than Total

  3. We have to be able to “translate” words into expressions What words indicate a particular operation? Table Talk with your group! Timer Multiply Divide Divided by Quotient One-half (÷2), Third (÷3), Quarter (÷4) Per Quotient Times Product Multiplied by Of Twice (×2), double (×2), triple (×3), etc. Half (×½), Third (×⅓), Quarter (×¼) Square (times itself 2 times)

  4. Learn Zillion Video • Video Objective/Goal: Learn how to write a numerical expression to represent a numerical situation (phrase) by using a visual model.

  5. Which of the following is the same as adding 8 and 7 and then multiply by 3 • 3 x (8 + 7) • 8 + 7 x3 • 29 • 48

  6. Answer: A 3 x (8 + 7)

  7. Which of the following is the same as subtracting 15 from 30, and then dividing by 3? A. 15 – 30 ÷ 3 B. (30-15) ÷ 3 C. (15 – 30) ÷ 3 D. 3 ÷ (30- 15)

  8. Answer B (30-15) ÷ 3

  9. Without calculating the expression, describe how 5 (10 x 10) relates to 10 x 10.

  10. Answer The expression 5 (10 x 10) is 5 times larger than the expression 10 x 10 since I know that 5 (10 x 10 ) means that I have 5 groups of (10 x 10).

  11. Brain Challenge!!!!!!! • Without calculating the expression, describe how 0.5 x (300 ÷ 15) relates to (300÷15). Before you begin, brainstorm what 0.5 could be equivalent to???????

  12. Answer • 0.5 x ( 300 ÷ 15) is One-half of ( 300 ÷ 15) .

  13. Today you learned how to I can write simple expressions that record calculations with numbers. 5.OA.2 1. Write simple expressions that record calculations with numbers. 2. Interpret numerical expressions without evaluating them. I know that expressions are a series of numbers and symbols.

  14. Independent Work Directions • Math Task Cards/Check your answers using the QR code at the bottom. If you got an answer wrong, go back and try the problem again. We will discuss your work at the beginning of tomorrow’s lesson. • Complete Page 12 Practice Page • Work on IXL: Q1

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