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Lesson 10: Estimating Decimal Sums and Differences



 1. 

Use the following table to answer the questions below.

Pop - $1.75
Chocolate Bar - $0.99
Chips - $1.45
Icecream - $2.89

If Colin bought a pop and a chocolate bar, about how much money did he spend?
a.
$2.75
b.
$3.00
c.
$3.25
d.
$3.75
 

 2. 

If Colin bought ice cream and a chocolate bar, how much money did he spend?
a.
$2.89
b.
$3.89
c.
$4.89
d.
$5.89
 

 3. 

Colin bought chips and paid with a $5.00 bill.  About how much change did he get back?
a.
$1.00
b.
$2.00
c.
$2.50
d.
$3.50
 

 4. 

Colin bought ice cream and paid with a $10.00 bill. About how much change did he get back?
a.
$3.00
b.
$5.00
c.
$7.00
d.
$9.00
 

 5. 

Colin bought pop, chips and a chocolate bar. If he paid with a $20.00 bill, about how much change did he get back?
a.
$14.00
b.
$15.00
c.
$16.00
d.
$17.00
 

 6. 

Estimate the sum.
    4.13 + 2.11
a.
6.2
b.
5.2
c.
4.2
d.
7.2
 

 7. 

Estimate the sum.
     5.9 + 1.2
a.
6
b.
7
c.
8
d.
9
 

 8. 

Estimate the sum.
     7.1 + 8.9 + 7.21
a.
20
b.
21
c.
22
d.
23
 

 9. 

Estimate the difference.
     7.9 - 1.2
a.
8
b.
7
c.
6
d.
5
 

 10. 

Estimate the difference.
     6.75 - 4.7
a.
2
b.
3
c.
4
d.
5
 



 
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