Column Addition: 45 + 23

Addition with Regrouping Calculator

What is 45 + 23?

Answer

45 + 23 =

68

No regrouping: each column is added on its own

45 + 23 in a column. No carries.
		4	5
	+	2	3
		6	8

Column by column: 45 + 23

Ones: 5 + 3 = 8 — write 8.
Tens: 4 + 2 = 6 — write 6.

45 + 23 = 68

Second check: 68 − 45 = 23

Similar examples to practise

Related Calculations

68 − 23 = 45 - 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 23

Example	Sum
23 + 23	46
26 + 23	49
28 + 23	51
34 + 23	57
36 + 23	59
39 + 23	62
41 + 23	64
45 + 23	68
47 + 23	70
52 + 23	75
54 + 23	77
58 + 23	81
63 + 23	86
65 + 23	88
67 + 23	90
69 + 23	92
71 + 23	94
74 + 23	97
76 + 23	99
77 + 23	100

FAQ

What is 45 + 23?

45 + 23 = 68

How do you check that 45 + 23 = 68?

Subtract one addend from the sum: 68 − 23 = 45, and 68 − 45 = 23. Getting the other addend back means the sum is right.

How many carries are there in 45 + 23?

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

Is 23 + 45 the same as 45 + 23?

Yes. Addition is commutative, so both give 68; the column looks the same with either number on top.