Addition with Regrouping: 172 + 28

Addition with Regrouping Calculator

What is 172 + 28?

Answer

172 + 28 =

200

With regrouping: 2 carries — into the tens and the hundreds

172 + 28 in a column. Carries are the small circled digits above the columns.
		1carry	1carry
		1	7	2
	+		2	8
		2	0	0

Column by column: 172 + 28

Ones: 2 + 8 = 10 — write 0, carry 1.
Tens: 7 + 2 + 1 = 10 — write 0, carry 1.
Hundreds: 1 + 1 = 2 — write 2.

172 + 28 = 200

Second check: 200 − 172 = 28

Similar examples to practise

Related Calculations

200 − 28 = 172 - 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
76 + 28	104
78 + 28	106
83 + 28	111
85 + 28	113
89 + 28	117
92 + 28	120
94 + 28	122
98 + 28	126
105 + 28	133
136 + 28	164
172 + 28	200
203 + 28	231
239 + 28	267
268 + 28	296
272 + 28	300
307 + 28	335
348 + 28	376
372 + 28	400
376 + 28	404
402 + 28	430

FAQ

What is 172 + 28?

172 + 28 = 200

How do you check that 172 + 28 = 200?

Subtract one addend from the sum: 200 − 28 = 172, and 200 − 172 = 28. Getting the other addend back means the sum is right.

How many carries are there in 172 + 28?

2 carries: 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 + 172 the same as 172 + 28?

Yes. Addition is commutative, so both give 200; the column looks the same with either number on top.

See Also