Vocab
Add the parts of decomposed numbers to find ___.
partial sums
0.7 + 0.1
0.8
0.54 - 0.10
0.44
Hansen weighed two metal balls during science class. The purple ball weighed 2.48 pounds and the red ball weighed 5.79 pounds. If he places both balls on the scale at the same time, what will the scale read?
8.27 pounds
A number close to an exact value
estimate
0.5 + 0.8
1.3
1.07 - 0.03
1.04
Jane completed a sprint in 29.75 seconds. Alex took 0.3 seconds longer. What was Alex's finishing time?
30.05 seconds
A tool used to represent tenths and hundredths
decimal grid
0.78 + 0.64
1.42
5.6 - 3.25
$48.75
A number that has a digit in the tenths place, hundredths place and beyond is called a __.
decimal
2.19 + 3.8
5.99
32.74 - 2.89
29.85
Tania bought a book for $152.75, a pen for $45.25, and a chocolate for $28.75. What total amount did she spend?
$226.75
To ______ a number means to break the number into parts by place value
decompose
1.35 + 0.45
1.80
13.25 - 9.5
3.75
Mary had $305.80 in her bank account. She deposited $250.25 more and then withdrew $317.50 from her account. What is the balance now in her account?
$238.55