Addition with Regrouping: 172 + 45

Addition with Regrouping Calculator

What is 172 + 45?

Answer

172 + 45 =

217

With regrouping: 1 carry — into the hundreds

172 + 45 in a column. Carries are the small circled digits above the columns.
		1carry
		1	7	2
	+		4	5
		2	1	7

Column by column: 172 + 45

Ones: 2 + 5 = 7 — write 7.
Tens: 7 + 4 = 11 — write 1, carry 1.
Hundreds: 1 + 1 = 2 — write 2.

172 + 45 = 217

Second check: 217 − 172 = 45

Similar examples to practise

Related Calculations

217 − 45 = 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 45

Example	Sum
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
136 + 45	181
172 + 45	217
203 + 45	248
239 + 45	284
268 + 45	313
307 + 45	352
348 + 45	393
376 + 45	421
402 + 45	447
453 + 45	498
485 + 45	530

FAQ

What is 172 + 45?

172 + 45 = 217

How do you check that 172 + 45 = 217?

Subtract one addend from the sum: 217 − 45 = 172, and 217 − 172 = 45. Getting the other addend back means the sum is right.

How many carries are there in 172 + 45?

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 45 + 172 the same as 172 + 45?

Yes. Addition is commutative, so both give 217; the column looks the same with either number on top.

See Also