Adding with regrouping: 3rd grade math lesson

What this lesson shows

12 tens become 1 hundred and 2 tens, said in place value.

The worked example

The lesson works this one step by step: 174 + 253. Then your kid tries one like it on paper.

The steps

Line up the ones
Add from the right
10 of a place: carry 1
Say it in place value

Helping at home

Line up the ones first. Add from the right, and say each column in its place: 12 tens is 1 hundred and 2 tens. Write the 2 and carry the 1 hundred above the hundreds.

If your kid gets stuck

Line up the ones first.

Watch it with Lux

With Lux, this lesson is a narrated video and a printed page your kid works on. Then Lux helps with the same math on their own worksheet, one question at a time.

See how Lux works

Standards

Common Core 3.NBT.A.2
Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
Common Core 4.NBT.B.4
Fluently add and subtract multi-digit whole numbers using the standard algorithm.

Matches a standard in all 50 states and DCSee each state's code

Alabama MA19.3.11, MA19.4.10
Alaska 3.NBT.2, 4.NBT.4
Arizona 3.NBT.A.2 *, 4.NBT.B.4
Arkansas 3.CAR.1, 4.CAR.2
California 3.NBT.A.2, 4.NBT.B.4
Colorado 3.NBT.A.2, 4.NBT.B.4
Connecticut 3.NBT.A.2, 4.NBT.B.4
Delaware 3.NBT.A.2, 4.NBT.B.4
District of Columbia 3.NBT.A.2, 4.NBT.B.4
Florida MA.3.NSO.2.1
Georgia 3.PAR.2.1, 3.PAR.2.2, 4.NR.2.1
Hawaii 3.NBT.A.2, 4.NBT.B.4
Idaho 3.NBT.A.2, 4.NBT.B.4
Illinois 3.NBT.A.2, 4.NBT.B.4
Indiana 3.CA.2, 3.CA.1
Iowa 3.NBT.A.2, 4.NBT.B.4
Kansas 3.NBT.2, 4.NBT.4
Kentucky KY.3.NBT.2, KY.4.NBT.4
Louisiana 3.NBT.A.2, 4.NBT.B.4
Maine 3.NBT.A.2, 4.NBT.B.4
Maryland 3.NOS.D.7.a, 3.NOS.D.7.b, 3.NOS.D.7.c, 4.NOS.B.3.b, 4.NOS.B.3.c, 4.NOS.B.3.d
Massachusetts 3.NBT.A.2, 4.NBT.B.4
Michigan 3.NBT.A.2, 4.NBT.B.4
Minnesota 3.1.2.1, 3.1.2.2
Mississippi 3.NBT.2, 4.NBT.4
Missouri 3.NBT.A.3, 4.NBT.A.5, 5.NBT.A.6
Montana MT.3.NBT.2, MT.4.NBT.4, 4.D1.5, 4.D2.7
Nebraska 3.A.1.a, 4.A.1.a
Nevada 3.NBT.A.2, 4.NBT.B.4
New Hampshire 3.NBT.A.2, 4.NBT.B.4
New Jersey 3.NBT.A.2, 4.NBT.B.4
New Mexico 3.NBT.A.2, 4.NBT.B.4
New York NY-3.NBT.2, NY-4.NBT.4
North Carolina NC.3.NBT.2.a, NC.3.NBT.2.b, NC.3.NBT.2.c, NC.4.NBT.4
North Dakota 3.NO.NBT.3, 4.NO.NBT.4
Ohio 3.NBT.2, 4.NBT.4
Oklahoma 3.N.2.3
Oregon 3.NBT.A.2, 4.NBT.B.4
Pennsylvania CC.2.1.3.B.1, CC.2.1.4.B.2
Rhode Island 3.NBT.A.2, 4.NBT.B.4
South Carolina 3.PAFR.1.1, 4.PAFR.1.1, 3.PAFR.2.2
South Dakota 3.NBT.A.2, 4.NBT.B.4
Tennessee 3.NBT.A.2, 4.NBT.B.4
Texas 111.5.b.4.A, 111.5.b.5.A, 111.6.b.4.A
Utah 3.NBT.2, 4.NBT.4
Vermont 3.NBT.A.2, 4.NBT.B.4
Virginia 3.CE.1c, 3.CE.1e, 4.CE.1c, 4.CE.1d
Washington 3.NBT.A.2, 4.NBT.B.4
West Virginia M.3.13, M.4.9
Wisconsin M.4.NBT.B.4, M.3.NBT.A.2
Wyoming 3.NBT.2

Adding with regrouping