Adding Decimals
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Adding Decimals
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DATE
TIME
For Problems 1–3, make an estimate. Write a number sentence to show how you
SRB
44, 128,
estimated. Then solve the problem using partial-sums addition, column addition, or
130
U.S. traditional addition. Use your estimate to check that your answer is reasonable.
2.4 + 9.3 = ?
5.8 + 3.36 = ?
12.07 + 6.98 = ?
1
2
3
(estimate)
(estimate)
(estimate)
2.4 + 9.3 =
5.8 + 3.36 =
12.07 + 6.98 =
For Problems 4 and 5, write a number model with a letter for the unknown. Then solve.
At the 2012 Summer Olympics in
In July 2006, the smallest living horse
4
5
London, Usain Bolt won the men’s
was 44.5 cm tall, from the ground to its
100-meter race with a time of
back. In May 2006, the smallest living
9.63 seconds and the men’s 200-meter
dog was 10.16 cm tall, from the ground
race with a time of 19.32 seconds. How
to the top of its head. How far from the
long did it take the sprinter to run the
ground would the dog’s head be if it
two races combined?
stood on the horse’s back?
(number model)
(number model)
Answer:
seconds
Answer:
cm
Practice
_
_
_
1
1
1
What is
of 12?
What is
of 11?
What is
of 11?
6
7
8
2
2
5
Answer:
Answer:
Answer:
115
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