Column Addition: 71 + 28

Addition with Regrouping Calculator

What is 71 + 28?

Answer

71 + 28 =

99

No regrouping: each column is added on its own

71 + 28 in a column. No carries.
		7	1
	+	2	8
		9	9

Column by column: 71 + 28

Ones: 1 + 8 = 9 — write 9.
Tens: 7 + 2 = 9 — write 9.

71 + 28 = 99

Second check: 99 − 71 = 28

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Related Calculations

99 − 28 = 71 - Column Subtraction

See Also

Subtraction with Regrouping Calculator - Column subtraction step by step, with borrowing across zeros
Long Multiplication Calculator - Column multiplication with partial products, step by step
Long Division Calculator - Step-by-step long division with detailed explanation
Adding Fractions Calculator - Add fractions, mixed numbers and whole numbers step by step

Recalculate with different values ↑

Column additions with 28

Example	Sum
41 + 28	69
45 + 28	73
47 + 28	75
52 + 28	80
54 + 28	82
58 + 28	86
63 + 28	91
65 + 28	93
67 + 28	95
69 + 28	97
71 + 28	99
72 + 28	100
74 + 28	102
76 + 28	104
78 + 28	106
83 + 28	111
85 + 28	113
89 + 28	117
92 + 28	120
94 + 28	122

FAQ

What is 71 + 28?

71 + 28 = 99

How do you check that 71 + 28 = 99?

Subtract one addend from the sum: 99 − 28 = 71, and 99 − 71 = 28. Getting the other addend back means the sum is right.

How many carries are there in 71 + 28?

None: no column adds up to 10 or more, so every digit of the sum is written straight away.

Is 28 + 71 the same as 71 + 28?

Yes. Addition is commutative, so both give 99; the column looks the same with either number on top.

See Also