What is a digit worth?: 2nd grade math lesson

What this lesson shows

Fixes a mistake

The 4 in 142 is 4 tens, worth 40. It is not 4, and not 40 tens.

The worked example

The lesson works this one step by step: 142. Then your kid tries one like it on paper.

The steps

Find the digit
Name its place
That many tens
Write what it is worth

Helping at home

Find the digit and name its place. A digit in the tens place is that many tens, so 4 tens is worth 40. Draw the rods to check.

If your kid gets stuck

Which place is the digit in?

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

What is a digit worth?