Addition with Regrouping: 45 + 28

Addition with Regrouping Calculator

What is 45 + 28?

Answer

45 + 28 =

73

With regrouping: 1 carry — into the tens

45 + 28 in a column. Carries are the small circled digits above the columns.
		1carry
		4	5
	+	2	8
		7	3

Column by column: 45 + 28

Ones: 5 + 8 = 13 — write 3, carry 1.
Tens: 4 + 2 + 1 = 7 — write 7.

45 + 28 = 73

Second check: 73 − 45 = 28

Similar examples to practise

Related Calculations

73 − 28 = 45 - Subtraction with Regrouping

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
28 + 28	56
34 + 28	62
36 + 28	64
39 + 28	67
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

FAQ

What is 45 + 28?

45 + 28 = 73

How do you check that 45 + 28 = 73?

Subtract one addend from the sum: 73 − 28 = 45, and 73 − 45 = 28. Getting the other addend back means the sum is right.

How many carries are there in 45 + 28?

1 carry: every time a column added up to 10 or more, its ones digit was written and 1 was carried to the next column on the left.

Is 28 + 45 the same as 45 + 28?

Yes. Addition is commutative, so both give 73; the column looks the same with either number on top.