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Topic 2 Review

Topic 2 Review. How could you estimate 4,789 + 3,153. Es timating makes problems eas ier!. Round first, then add!. Find your place, look next door! Five or greater, add 1 more. Numbers to the left stay the same. Numbers to the right- zero’s your name!. 4,789 + 3,153. 3,000. 5,000. +.

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Topic 2 Review

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  1. Topic 2 Review

  2. How could you estimate4,789 + 3,153 • Estimating makes problems easier! Round first, then add! Find your place, look next door! Five or greater, add 1 more. Numbers to the left stay the same. Numbers to the right- zero’s your name! 4,789 + 3,153 3,000 5,000 + 8,000

  3. How could you estimate this to the nearest thousand?15,165 + 24,986 • Estimating makes problems easier! Round first, then add! Find your place, look next door! Five or greater, add 1 more. Numbers to the left stay the same. Numbers to the right- zero’s your name! 15,165 + 24,986 25,000 15,000 + 40,000

  4. How could you estimate this to the nearest thousand?8,722 + 16,110 • Estimating makes problems easier! Round first, then add! Find your place, look next door! Five or greater, add 1 more. Numbers to the left stay the same. Numbers to the right- zero’s your name! 8,722 + 16,110 16,000 9,000 + 25,000

  5. How could you estimate this to the nearest thousand?8,722 + 16,110 • Estimating makes problems easier! Round first, then add! Find your place, look next door! Five or greater, add 1 more. Numbers to the left stay the same. Numbers to the right- zero’s your name! 8,722 + 16,110 16,000 9,000 + 25,000

  6. How could you estimate this to the nearest thousand?16,056 – 14,896 • Estimating makes problems easier! Round first, then subtract! Find your place, look next door! Five or greater, add 1 more. Numbers to the left stay the same. Numbers to the right- zero’s your name! 16,056 – 14,896 15,000 16,000 - 1,000

  7. How could you estimate this to the nearest whole number?9.63 + 4.25 This means the 1’s place! • Estimating makes problems easier! Round first, then add! Find your place, look next door! Five or greater, add 1 more. Numbers to the left stay the same. Numbers to the right- zero’s your name! 9.63 + 4.25 4.00 10.00 + 14

  8. How could you estimate this to the nearest whole number?12.34 – 8.69 This means the 1’s place! • Estimating makes problems easier! Round first, then subtract! Find your place, look next door! Five or greater, add 1 more. Numbers to the left stay the same. Numbers to the right- zero’s your name! 12.34 - 8.69 9.00 12.00 - 3

  9. How could you estimate this to the nearest whole dollar?$3.65 - $1.36 This means the 1’s place! • Estimating makes problems easier! Round first, then subtract! Find your place, look next door! Five or greater, add 1 more. Numbers to the left stay the same. Numbers to the right- zero’s your name! $3.65 - $1.36 $1.00 $4.00 - $3.00

  10. How could you estimate this to the nearest whole number?320.08 – 114.56 This means the 1’s place! • Estimating makes problems easier! Round first, then subtract! Find your place, look next door! Five or greater, add 1 more. Numbers to the left stay the same. Numbers to the right- zero’s your name! 320.08 – 114.56 320.00 - 115.00 205.00

  11. Round this number to the nearest tenth. 12.65 12.70 or 12.7

  12. Round this number to the nearest tenth. 24.43 24.40 or 24.4

  13. Round this number to the nearest tenth. 13.27 13.30 or 13.3

  14. Round this number to the nearest tenth. 8.59 8.60 or 8.6

  15. You can add and subtract numbers with decimals! What are the three rules? (This is my boring guy voice talking!) LINE UP THE DECIMALS! Add or subtract normally. Make sure you have the decimal in the answer.

  16. 2.6 + .14 2 6 0 1 4 + 7 2 4 You can do it!

  17. 1.52 + 1.61 1 1 5 2 1 6 1 + 1 3 3 You can do it! 3.13

  18. 1.54 – 0.36 4 14 1 5 4 6 3 0 - 1 1 8 You can do it! 1.18

  19. 1.26 – 0.18 1 16 1 2 6 8 1 0 - 0 1 8 You can do it! 1.08

  20. 5 fruit WHOLE 2 oranges 3 apples PART PART

  21. 7 pets WHOLE 3 dogs 4 cats PART PART

  22. $3.35 cost WHOLE What do I know? So what can I figure out? $.85 for coke $2.50 for chips PART PART

  23. $3.35 cost WHOLE What do I know? So what can I figure out? $.85 for coke $2.50 for chips PART PART

  24. Here’s a fun game you can play to practice more! http://www.mathplayground.com/PartPartWhole.html

  25. B.A.S.O Teach your parent or sibling all about a way we can practice borrowing in a subtraction problem!

  26. You have to borrow from mom! So now mom only has 4 ten dollar bills, but you have 11 dollars! So you’ve borrowed, added back….. now start over! Now Mom has to borrow from Dad! But wait! He’s broke!! Dad- Go borrow from Grandma! Now Grandma has 2 thousand-dollar bills, and Dad has ten hundred dollar bills! We’ve borrowed, added back, now start over! Oh wait, Mom needs to borrow from Dad! 14 9 Now Dad has 9 hundred-dollar bills, and Mom has 14 ten dollar bills! We’ve borrowed, added back, now start over! 11 10 2 4 3 0 5 1 - 1 4 8 2 1 , 9 9 5 6

  27. There are tons of subtraction problems with borrowing on the test! DO BASO, take your time, use your strategies, and you’ll be fine!

  28. To practice more skills from the test, visit Daily Math on my website! STUDY HARD & GOOD LUCK!  I know you can do it!!!

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