The end of a row: 1st grade math lesson

What this lesson shows

Fixes a mistake

After 39 comes 40, the next ten, not 30. Move to the start of the next row.

The worked example

The lesson works this one step by step: 39. Then your kid tries one like it on paper.

The steps

9 and 1 more make a ten
The tens go up by one
Then start the next row

Helping at home

After a number ending in 9, one more makes a new ten: 39, 40. After 40, the count goes on at the start of the next row, 41.

If your kid gets stuck

9 ones and 1 more make a new ten.

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.A.1
Count to 120, starting at any number less than 120. In this range, read and write numerals and represent a number of objects with a written numeral.

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

Alabama MA19.1.10a, MA19.1.10b, MA19.1.10c, MA19.1.10d
Alaska 1.CC.1, 1.CC.3, 1.NBT.1
Arizona 1.NBT.A.1
Arkansas 1.NPV.1, 1.NPV.2, 1.NPV.4
California 1.NBT.A.1
Colorado 1.NBT.A.1
Connecticut 1.NBT.A.1
Delaware 1.NBT.A.1
District of Columbia 1.NBT.A.1
Florida MA.1.NSO.1.1
Georgia 1.NR.1.1, 1.PAR.3.2, 2.NR.1.2
Hawaii 1.NBT.A.1
Idaho 1.NBT.A.1
Illinois 1.NBT.A.1
Indiana 1.NS.1, 2.NS.1
Iowa 1.NBT.A.1
Kansas 1.NBT.1
Kentucky KY.1.NBT.1.a, KY.1.NBT.1.b
Louisiana 1.NBT.A.1
Maine 1.NBT.A.1
Maryland 1.NOS.A.1.a, 1.NOS.A.2, 2.NOS.A.2.a
Massachusetts 1.NBT.A.1
Michigan 1.NBT.A.1
Minnesota 1.1.1.2, 1.1.1.3, 1.1.2.3
Mississippi 1.NBT.1, 2.NBT.2
Missouri 1.NS.A.1, 1.NS.A.2, 1.NS.A.3, 1.NS.A.4, 2.RA.B.2.a
Montana MT.1.NBT.1
Nebraska 1.N.2.a, 1.N.2.b, 1.N.2.c, 1.N.2.d
Nevada 1.NBT.A.1
New Hampshire 1.NBT.A.1
New Jersey 1.NBT.A.1
New Mexico 1.NBT.A.1
New York NY-1.NBT.1
North Carolina NC.1.NBT.1, NC.1.NBT.7
North Dakota 1.NO.CC.1, 1.NO.CC.2, 1.NO.CC.3, 1.NO.CC.5, 2.NO.CC.4
Ohio 1.NBT.1
Oklahoma 1.N.1.3, 1.N.1.4, 1.N.1.5
Oregon 1.NBT.A.1
Pennsylvania CC.2.1.1.B.1
Rhode Island 1.NBT.A.1
South Carolina 1.NR.2.1, 2.NR.2.1, 1.NR.1.1, 1.NR.2.2
South Dakota 1.NBT.A.1.a, 1.NBT.A.1.b, 1.NBT.A.1.c
Tennessee K.CC.A.1, 1.NBT.A.1
Texas 111.3.b.2.C, 111.3.b.5.A, 111.3.b.5.B
Utah 1.NBT.1
Vermont 1.NBT.A.1
Virginia 1.NS.1a, 1.NS.1b, 1.NS.1c, 1.NS.1d, 1.NS.2a, 2.NS.1a
Washington 1.NBT.A.1
West Virginia M.1.9
Wisconsin M.1.NBT.A.1
Wyoming 1.NBT.1a, 1.NBT.1b, 1.NBT.1c, 1.NBT.1d

The end of a row