Many names for one number: 2nd grade math lesson

What this lesson shows

241 is 2 hundreds, 4 tens, and 1 one. It is also 24 tens and 1 one, or 241 ones.

The worked example

The lesson works this one step by step: 241. Then your kid tries one like it on paper.

The steps

Hundreds, tens, and ones
A hundred is 10 tens
A ten is 10 ones
Same number

Helping at home

Start with hundreds, tens, and ones. Each hundred is 10 tens: add them to the tens. Each ten is 10 ones: add them to the ones. Every name is the same number.

If your kid gets stuck

A hundred is 10 tens.

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 2.NBT.A.1
Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:

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

Alabama MA19.2.6a
Alaska 2.NBT.1.a, 2.NBT.1.b
Arizona 2.NBT.A.1.a, 2.NBT.A.1.b
Arkansas 2.NPV.2, 2.NPV.3
California 2.NBT.A.1
Colorado 2.NBT.A.1.a, 2.NBT.A.1.b
Connecticut 2.NBT.A.1
Delaware 2.NBT.A.1
District of Columbia 2.NBT.A.1
Florida MA.2.NSO.1.1, MA.2.NSO.1.2
Georgia 2.NR.1.1
Hawaii 2.NBT.A.1
Idaho 2.NBT.A.1.a, 2.NBT.A.1.b, 2.NBT.A.3
Illinois 2.NBT.A.1
Indiana 2.NS.2, 2.NS.4
Iowa 2.NBT.A.1.a, 2.NBT.A.1.b
Kansas 2.NBT.1.a, 2.NBT.1.b, 2.NBT.1.c, 2.NBT.3
Kentucky KY.2.NBT.1.a, KY.2.NBT.1.b
Louisiana 2.NBT.A.1.a, 2.NBT.A.1.b
Maine 2.NBT.A.1a, 2.NBT.A.1b
Maryland 2.NOS.A.1.a, 2.NOS.A.1.b, 2.NOS.A.1.c
Massachusetts 2.NBT.A.1.a, 2.NBT.A.1.b
Michigan 2.NBT.A.1
Minnesota 2.1.1.1, 2.1.1.2
Mississippi 2.NBT.1.a, 2.NBT.1.b
Missouri 2.NBT.A.1, 2.NBT.A.2, 2.NBT.A.4
Montana MT.2.NBT.1, MT.2.NBT.3
Nebraska 2.N.1.a, 2.N.3.a, 2.N.3.b
Nevada 2.NBT.A.1
New Hampshire 2.NBT.A.1
New Jersey 2.NBT.A.1a, 2.NBT.A.1b
New Mexico 2.NBT.A.1
New York NY-2.NBT.1.a, NY-2.NBT.1.b
North Carolina NC.2.NBT.1.a, NC.2.NBT.1.b, NC.2.NBT.1.c
North Dakota 2.NO.NBT.1, 2.NO.CC.3
Ohio 2.NBT.1.a, 2.NBT.1.b, 2.NBT.3
Oklahoma 2.N.1.1, 2.N.1.3
Oregon 2.NBT.A.1
Pennsylvania CC.2.1.2.B.1
Rhode Island 2.NBT.A.1.a, 2.NBT.A.1.b
South Carolina 2.NR.1.3, 2.NR.1.2, 2.NR.1.1
South Dakota 2.NBT.A.3, 2.NBT.A.1.a, 2.NBT.A.1.b
Tennessee 2.NBT.A.1, 2.NBT.A.3
Texas 111.4.b.2.A, 111.4.b.2.B
Utah 2.NBT.1.a, 2.NBT.1.b
Vermont 2.NBT.A.1
Virginia 2.NS.2a, 2.NS.2b, 2.NS.2c, 2.NS.2d, 2.NS.2e
Washington 2.NBT.A.1
West Virginia M.2.6
Wisconsin M.2.NBT.A.1
Wyoming 2.NBT.1a, 2.NBT.1b, 2.NBT.1c, 2.NBTP.1.A, 2.NBTP.1.B, 2.NBTP.1.C

Many names for one number