1,631+342=
What type of estimation strategy would you use and what is your estimation?
Front-end, Close-to or Rounding
2,000+300+2,300
300
987-235=
752
300
If a rectangle has 1 side that is 10 feet and another side that is 5 feet, what is the perimeter of the rectangle?
30 feet
400
6,890____6,980
6,890 < 6,980
400
20,580--->21,000
What is 20,580 rounded to the nearest thousand?
400
How can you use your estimate to see if you actual answer makes sense?
If the estimate is close to my actual answer, then my actual answer makes sense.
400
1,082-534=
548
400
Convert 12 yards into feet.
36 feet
500
56,118____9,118
56,118 > 9,118
500
481,242--->500,000
What is 481,242 rounded to the nearest hundred thousand?
500
Sandy made 61 cookies on Wednesday, 28 on Thursday, and 157 on Friday. She ate 8 cookies. She needs 220 cookies for her family reunion. Without solving, do you think she made enough?
Yes 60+30+150=240
500
9,001-438=
8,563
500
If a square has one side that measures 6 inches, what is it's perimeter and area?