Adding and Subtracting Decimal Numbers
In order to add or subtract decimal numbers, each number needs to have the same number of digits behind the decimal point. If you write the problem vertically, you can avoid the common problem of adding the numbers incorrectly. For instance, 1.2 + 3.41 is not 4.43. The ‘‘2’’ needs to be added to the ‘‘4,’’ not to the ‘‘1.’’
1.20 (Add as many zeros at the
end as you need.)
4.43 +
5.63
510.3 – 422.887 becomes
510.300
422.887 _
87.413
Practice
Rewrite as a vertical problem and solve.
1.
7.26 + 18.1
2.
5 – 2.76
3.
15.01 –
6.328
4.
968.323 –
13.08
5.
28.56 –
16.7342
6.
0.446 +
1.2
7.
2.99 + 3
Solutions
1.
7.26 + 18:1
7.26
18.10 +
25.36
2.
5 – 2:76
5.00
2.76 _
2.24
3.
15.01 – 6.328
15.010
6.328 _
8.682
4.
968.323 –
13.08 968.323
13.080 _
955.243
5.
28.56 – 16.7342
28.5600
16.7342 _
11.8258
6.
0.446 + 1.2
0.446
1.200 +
1.646
7.
2.99 +3 2.99
3:00 +
5.99
Thanks for reading Adding and Subtracting Decimal Numbers. Please share...!
