Rounding
Estimating Products
Word Problems
Models & Representations
Mystery Bag!
100
Round the number to the tens place: 243
240
100
Estimate the product: 103 x 11
1,000
100
For breakfast I got 8 donuts for $3 each and 6 kolaches for $6 each. How much money did I spend altogether?
$60
100
What is the multiplication equation for this strip diagram?
8 x 7
100
2/4 + 2/8 =
3/4 OR 6/8
200
Round 286,321 to the ten-thousands place
290,000
200
Pystol had 15 boxes of crayons, with 24 crayons in each box. ABOUT how many crayons did she have?
400
200
Minnie has 3 boxes of pencils. Each box has 12 pencils. She gave Mickey 10 pencils. How many pencils does Minnie have left?
26 pencils
200
Solve the strip diagram
? = 1,823
200
Compare the decimals: 2.043 VS. 2.403
2.043 < 2.403
300
Round 7,959,921 to the millions place.
8,000,000
300
Estimate the product: 473 x 523
250,000
300
One bus holds 34 people. On the field trip to the zoo, we completely filled up 8 buses. How many people went to the zoo?
272 people
300
Matt has “P” pieces of gum. He had 7 packs of gum with 36 pieces each. He then chewed 12 pieces. Which equation can be used to represent how to find the number “P” pieces of gum that Matt has?
A. P= 12 x 7 -36
B. P -12 = 12 x 36
C. 12 x 36 = P + 12
C. 12 x 36 = P + 12
300
Order the decimals from least to greatest: 5.06, 5.006, 5.60, 6.506
5.006, 5.06, 5.60, 6.506
400
Graci rounded a number to 4,000. Which one of the numbers below could NOT have been the original number?
A. 4,002
B. 3,971
C. 4,010
D. 5,000
D. 5,000
400
Tom had 10 buckets of tennis balls. Each bucket had 37 tennis balls in it. About how many tennis balls did Tom have in all?
400
400
My sister got 29 pieces of candy on Halloween. I got three times as much as her. How many candies do we have altogether?
116 pieces
400
What multiplication problem is shown by the representation?
35 x 41
400
One tenth the value of the thousands place
500
Dane had 64 chess pieces, 28 checkers, and two chess boards. Round the number of chess pieces to the nearest tens place.
60 Chess pieces
500
Estimate the product: 3,980 x 57,403
240,000,000
500
I do my homework every day as soon as I get home from school. I spend 45 minutes on my homework each day, Monday through Friday. How many minutes did I spend on homework in the six week grading period?
1,350 minutes
500
Solve 68x54 using the box method.
3,672
500
15.043 + 273. 747
288.79