Estimating and Place Value
In the number 7,954, the digit 7 is in the _____ place?
Its value is _______.
thousands, 7000
3,786 + 1,023
4,809
___ x 9 = 36 + 9 + 9 + 9
7
232 + 98 = ___ + 100
230
What is the equation represented by this array?
XXXXXX
XXXXXX
XXXXXX
3 x 6 = 18
What number is 700 less than 1,639?
939
3000 - 1697
1303
412 x 4
1648
437 + 42 = ____ + 79
400
A store sells 1,124 fewer red candies than blue candies. It sells 2,317 red candies. How many red and blue candies does the store sell in all?
5758 candies in all.
Estimate the sum of 432 + 365 + 159 by rounding to the hundreds.
400 + 400 + 200
about 10,000
Which 2 numbers have a difference between them of 245?
2390 2125 2580 2635
2635 - 2390 = 245
What #s between 31 and 50 can be divided by 8 with no remainders?
32, 40, 48
525 - 98 = _____ - 100
527
Emmy, Audrey, and Alisa walked 420 feet altogether. Audrey walked twice as much as Alisa and Emmy walked twice as much as Audrey. How far did they each walk?
7 units = 420
Alisa: 1 unit = 60 ft
Audrey: 2 units = 2 x 60 = 120 ft
Emmy: 4 units = 4 x 60 = 240 ft
Estimate the difference 728 and 565 using front end estimation.
700 - 500 = 200
The sum of 2 numbers is 100. The difference between the numbers is 24, What are the numbers?
38, 62
Noodles has 75 bones. He shares them with 4 friends. How many bones are leftover?
3 bones will be leftover
18 R3
8 x 7 = ___ + 7 + 7 + 7
35
Bella has 485 wooden beads. She has 285 fewer glass beads than wooden beads. If she uses 50 glass beads for each necklace, how many necklaces can she make?
She has 200 glass beads. She can make 4 necklaces.
Solve 38 + 49 = 88 - ____
Explain the mental math strategy.
1
What is the missing digit?
5 3 2 __
+ 3 5 __ 3
_____________
__ 9 1 1
8
Is 79 divided by 3 equal to 25 R2?
What strategy would you use to check this problem?
No, the answer is 26 R 1
Multiply 25 x 3 = 75 then at the remainder of 2 = 77. 77 does not equal 79 so the answer is not correct.
6 x 8 = 24 + ____
24
Use the 9 3 7 6 digits to create 2 multiplication equations and 2 division equations.
7 x 9 = 63 and 9 x 7 = 93
63 divided by 7 = 9
63 divided by 9 = 7