Why are muliplication and division done before addition and subtraction.pptx
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Transcript of Why are muliplication and division done before addition and subtraction.pptx
![Page 1: Why are muliplication and division done before addition and subtraction.pptx](https://reader035.fdocuments.us/reader035/viewer/2022070318/557bf6cdd8b42ab9388b4747/html5/thumbnails/1.jpg)
What is the total?a. 3 + 7 • 5
b. How much money would Luz have if she had 3 pennies and 7
nickels?
![Page 2: Why are muliplication and division done before addition and subtraction.pptx](https://reader035.fdocuments.us/reader035/viewer/2022070318/557bf6cdd8b42ab9388b4747/html5/thumbnails/2.jpg)
Why are multiplication and division done before addition and subtraction?
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Using context, how can this equation be made true?
2 + 8 = 28
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Using context, how can this equation be made true?
2 + 8 = 28
2 tens + 8 ones = 28 ones
2 dozen + 8 halves = 28 ones
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How do you go about adding …
2,416 + 753 =
Would you rewrite it or imagine it vertically?
2416 + 753
2 thousands + 4 hundreds + 1 ten + 6 ones+ 7 hundreds + 5 tens + 3 ones
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The football team scored 4 touchdowns, worth 6 points each; kicked 3 extra points, worth 1 point
each; and kicked 1 field goal, worth 3 points. What was the team’s final score?
Express the relationship using English sentences, then use that sentence to write the situation in math language (an expression or an equation).
T = 4 • 6 + 3 • 1 + 1 • 3
Football Score
Total Score is 4 touchdowns + 3 extra points + 1 field goal
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Car Price$21,000
Sales Tax is 6%
Dealer Rebate is $1,000
In the end, how much will you pay for your new car?
New Car
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Christmas Shopping
There’s a 20% off sale on fashion accessories. You buy your mom a necklace regularly priced at $14 and a belt marked $23. You have a coupon for 10% off your purchase.
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Back to School Shopping
You buy your son a pair of pants for $15 and five uniform shirts that are $12 each. You have a coupon for $5 off pants.
Express the relationship using English sentences, then use that sentence to write the situation in math language (an expression or an equation).
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Basketball Score
Marquis’ team made 11 successful free throws (1 point each), 25 two-point shots, and 8 three-point shots.
Express the relationship using English sentences, then use that sentence to write the situation in math language (an expression or an equation).
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Movie Night
Tickets :$8 Children 12 and under$10 Adults
You take 4 children and 2 adults to a movie and splurge for a large popcorn.
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Multiply and then Add
46 x 35 230+1380 1610
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We need to add and subtract LIKE items
a. 3 + 7 • 5
b. How much money would Luz have if she had 3 pennies and 7 nickels?
2 thousands + 4 hundreds + 1 ten + 6 ones+ 7 hundreds + 5 tens + 2 ones
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How Much Money Do You Have?
You have three $20 bills, two $5 bills, eight $1 bills, and seven quarters. How much money do you have? Express the relationship using an informal sentence; then use that sentence as the framework for writing a mathematical equation of the problem. Explain and justify the computation step by step.
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Why are multiplication and division done before addition and subtraction?
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When do we simplify the exponent?
𝑥3
20 – 4 • 2 +
𝑥2