Column Addition: 54 + 45

Addition with Regrouping Calculator

What is 54 + 45?

Answer

54 + 45 =

99

No regrouping: each column is added on its own

54 + 45 in a column. No carries.
		5	4
	+	4	5
		9	9

Column by column: 54 + 45

Ones: 4 + 5 = 9 — write 9.
Tens: 5 + 4 = 9 — write 9.

54 + 45 = 99

Second check: 99 − 54 = 45

Similar examples to practise

Related Calculations

99 − 45 = 54 - 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 45

Example	Sum
45 + 45	90
47 + 45	92
52 + 45	97
54 + 45	99
58 + 45	103
63 + 45	108
65 + 45	110
67 + 45	112
69 + 45	114
71 + 45	116
74 + 45	119
76 + 45	121
78 + 45	123
83 + 45	128
85 + 45	130
89 + 45	134
92 + 45	137
94 + 45	139
98 + 45	143
105 + 45	150

FAQ

What is 54 + 45?

54 + 45 = 99

How do you check that 54 + 45 = 99?

Subtract one addend from the sum: 99 − 45 = 54, and 99 − 54 = 45. Getting the other addend back means the sum is right.

How many carries are there in 54 + 45?

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

Is 45 + 54 the same as 54 + 45?

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

See Also