Value vs. Place Value
245,689,123.076
OBJ: I can estimate
decimal sums and differences
Option 1: Round to the nearest whole number:
3.4
+ 2.78
4.19
Option 2: Round to the nearest whole dollar:
$27.95
­ $11.72
Option 3: Round to the nearest ten dollars:
$27.95
­ $11.72
Option 4: Use benchmarks to estimate:
** Hint: Think of Money **
0c
25c
50c
75c
0.18 + 0.43
Use rounding to estimate:
2.34
+ 1.9
5.23
Use rounding to estimate:
10.39
­ 4.28
Use rounding to estimate:
$19.75
­ $ 3.98
Use rounding to estimate:
3.99
+ 6.24
Use benchmarks to estimate:
0c
25c
50c
0.76 ­ 0.22
75c
Use benchmarks to estimate:
0c
25c
0.34
0.1
+ 0.25
50c
75c
For the week of April 4, 1064, the Beatles had the top four songs. About how long would it take to listen to these four songs?
Amaya bought sneakers for $54.26 and a shirt for $34.34. If Amaya started with $100, about how much money does she have left?
A. $5
B. $20
C. $35
D. $80
White Boards
Use rounding to estimate:
14.68
­ 9.93
Use rounding to estimate:
0.93
+ 0.18
Use rounding to estimate:
7.41
­
3.88
Use benchmarks to estimate:
12.41
­ 6.47
Use benchmarks to estimate:
8.12
+ 5.52
Use benchmarks to estimate:
9.75
­
3.47
Jake bought new shoes for $17.38.
He paid with $20. About how much
change should he receive?