Extra ones make a ten: 1st grade math lesson

What this lesson shows

Fixes a mistake

6 tens and 13 ones is 73, not 63. Ten of the ones make another ten.

The worked example

The lesson works this one step by step: 6 tens and 13 ones. Then your kid tries one like it on paper.

The steps

Ten ones make a ten
Trade them for a rod
Then write the number

Helping at home

When there are 10 ones or more, trade 10 of them for a ten. Then write the tens and the ones left.

If your kid gets stuck

Are there 10 ones to trade?

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 1.NBT.B.2a
10 can be thought of as a bundle of ten ones — called a "ten."

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

Alabama MA19.1.11a
Alaska 1.CC.4, 1.NBT.2.a
Arizona 1.NBT.B.2.a
Arkansas 1.NPV.3, 1.NPV.4
California 1.NBT.B.2
Colorado 1.NBT.B.2.a
Connecticut 1.NBT.B.2
Delaware 1.NBT.B.2
District of Columbia 1.NBT.B.2
Florida MA.1.NSO.1.3
Georgia 1.NR.1.2
Hawaii 1.NBT.B.2
Idaho 1.NBT.B.2.a
Illinois 1.NBT.B.2
Indiana 1.NS.2
Iowa 1.NBT.B.2.a
Kansas 1.NBT.2.a, 1.NBT.2.d
Kentucky KY.1.NBT.2.a
Louisiana 1.NBT.B.2.a
Maine 1.NBT.B.2a
Maryland 1.NOS.B.3.a, 1.NOS.B.3.b, 1.NOS.B.3.c
Massachusetts 1.NBT.B.2.a
Michigan 1.NBT.B.2
Minnesota 1.1.1.1, 1.1.1.2
Mississippi 1.NBT.2.a
Missouri 1.NBT.A.1, 1.NBT.A.2
Montana MT.1.OA.3, MT.1.NBT.1, MT.1.NBT.2
Nebraska 1.N.3.a
Nevada 1.NBT.B.2
New Hampshire 1.NBT.B.2
New Jersey 1.NBT.B.2a
New Mexico 1.NBT.B.2
New York NY-1.NBT.2.a
North Carolina NC.1.NBT.2.a
North Dakota 1.NO.NBT.1
Ohio 1.NBT.2
Oklahoma 1.N.1.2, 1.N.1.3
Oregon 1.NBT.B.2
Pennsylvania CC.2.1.1.B.2
Rhode Island 1.NBT.B.2.a
South Carolina 1.NR.1.2, 1.NR.1.3, 1.NR.1.1
South Dakota 1.NBT.B.2.a
Tennessee 1.NBT.B.3
Texas 111.3.b.2.B, 111.3.b.2.C
Utah 1.NBT.2.a
Vermont 1.NBT.B.2
Virginia K.NS.1j, 1.NS.1e, 1.NS.2c, 1.NS.2d
Washington 1.NBT.B.2
West Virginia M.1.10
Wisconsin M.1.NBT.B.2
Wyoming 1.NBT.2a, 1.NBTP.2.A

Extra ones make a ten