Place Value
What digit is in the tens place in the number 652?
5
round 23 to the nearest ten
20
estimate the following:
12 + 32
ex: 40
Name a compatible number for :
57
Ex: 50
66 + 32
98
Create a number with a 9 in the hundreds place
Ex: 985
Round 299 to the nearest hundred
300
Estimate the following:
97 + 11
110
Name a compatible number for 132
Ex: 130
174 - 63
91
What is the value of the digit 3 in the following number:
2543
3 ones (3)
Round 25 to the nearest hundred
0
Estimate the following:
123 - 32
Ex: 130 - 30 = 100
What is a compatible Number?
A number that is close to the actual number but easy to add or subtract.
223 + 49
272
As place value increases, the value of the digit increases by how much?
Round 134 to the nearest ten
130
Estimate the following:
576 - 75
Ex: 575 - 75 = 500
Why is it good to know how to estimate?
321 - 76
245
As place value decreases, the value of the digits decrease by how much?
Round 1276 to the nearest ten
1280
Estimate the following:
987 - 51
Ex: 1000 - 50 = 950
Name a scenario when we would have to use estimation
...
111-93
18