Let’s solve each addition problem step by step. We’re adding decimals less than 1, and sometimes we need to regroup (carry over) when the sum in a column is 10 or more.
We’ll go row by row, left column first, then right column.
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Left Column:
1.
0.91 + 0.4
Think of it as:
0.91
+ 0.40 ← add a zero to make places match
= 1.31
→ 91 hundredths + 40 hundredths = 131 hundredths → 1.31
2.
0.85 + 0.2
0.85
+ 0.20
= 1.05
→ 85 + 20 = 105 hundredths → 1.05
3.
0.80 + 0.5
0.80
+ 0.50
= 1.30 → which is 1.3
→ 80 + 50 = 130 hundredths → 1.30 or 1.3
4.
0.72 + 0.5
0.72
+ 0.50
= 1.22
→ 72 + 50 = 122 hundredths → 1.22
5.
0.8 + 0.79
0.80
+ 0.79
= 1.59
→ 80 + 79 = 159 hundredths → 1.59
6.
0.1 + 0.91
0.10
+ 0.91
= 1.01
→ 10 + 91 = 101 hundredths → 1.01
7.
0.3 + 0.95
0.30
+ 0.95
= 1.25
→ 30 + 95 = 125 hundredths → 1.25
8.
0.99 + 0.7
0.99
+ 0.70
= 1.69
→ 99 + 70 = 169 hundredths → 1.69
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Right Column:
9.
0.1 + 0.95
0.10
+ 0.95
= 1.05
→ 10 + 95 = 105 hundredths → 1.05
10.
0.6 + 0.54
0.60
+ 0.54
= 1.14
→ 60 + 54 = 114 hundredths → 1.14
11.
0.6 + 0.67
0.60
+ 0.67
= 1.27
→ 60 + 67 = 127 hundredths → 1.27
12.
0.8 + 0.28
0.80
+ 0.28
= 1.08
→ 80 + 28 = 108 hundredths → 1.08
13.
0.54 + 0.7
0.54
+ 0.70
= 1.24
→ 54 + 70 = 124 hundredths → 1.24
14.
0.79 + 0.9
0.79
+ 0.90
= 1.69
→ 79 + 90 = 169 hundredths → 1.69
15.
0.80 + 0.4
0.80
+ 0.40
= 1.20 → which is 1.2
→ 80 + 40 = 120 hundredths → 1.20 or 1.2
16.
0.6 + 0.41
0.60
+ 0.41
= 1.01
→ 60 + 41 = 101 hundredths → 1.01
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All answers checked for accuracy. Regrouping was needed whenever the hundredths added up to 100 or more — that means we carry 1 to the ones place.
Final Answer:
0.91 + 0.4 = 1.31
0.85 + 0.2 = 1.05
0.80 + 0.5 = 1.3
0.72 + 0.5 = 1.22
0.8 + 0.79 = 1.59
0.1 + 0.91 = 1.01
0.3 + 0.95 = 1.25
0.99 + 0.7 = 1.69
0.1 + 0.95 = 1.05
0.6 + 0.54 = 1.14
0.6 + 0.67 = 1.27
0.8 + 0.28 = 1.08
0.54 + 0.7 = 1.24
0.79 + 0.9 = 1.69
0.80 + 0.4 = 1.2
0.6 + 0.41 = 1.01
Parent Tip: Review the logic above to help your child master the concept of tenths and hundredths worksheet grade 5.
