One more, ten more: 1st grade math lesson

What this lesson shows

47 on a hundred chart: one more is 48, one less 46, ten more 57, ten less 37.

The worked example

The lesson works this one step by step: 47. Then your kid tries one like it on paper.

The steps

One more: to the right
One less: to the left
Ten more: below
Ten less: above

Helping at home

Find the number on a 120 chart. One more and one less sit beside it. Ten more sits just below it, and ten less just above it.

If your kid gets stuck

Right, left, down, up.

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.C.5
Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

Matches standards in 48 statesSee each state's code

Alabama MA19.1.14
Alaska 1.NBT.5
Arizona 1.NBT.C.5
Arkansas 1.NPV.6
California 1.NBT.C.5
Colorado 1.NBT.C.5
Connecticut 1.NBT.C.5
Delaware 1.NBT.C.5
District of Columbia 1.NBT.C.5
Florida MA.1.NSO.2.3
Georgia K.NR.1.3, 1.NR.5.2
Hawaii 1.NBT.C.5
Idaho 1.NBT.C.5
Illinois 1.NBT.C.5
Iowa 1.NBT.C.5
Kansas 1.NBT.5
Kentucky KY.1.NBT.5
Louisiana 1.NBT.C.5
Maine 1.NBT.C.5
Maryland 1.NOS.A.1.b, 1.NOS.E.11
Massachusetts 1.NBT.C.5
Michigan 1.NBT.C.5
Minnesota K.1.1.4, 1.1.1.4
Mississippi 1.NBT.5
Missouri 1.NBT.A.4, 1.NBT.B.6
Montana MT.1.NBT.5
Nebraska 1.N.4.d
Nevada 1.NBT.C.5
New Hampshire 1.NBT.C.5
New Jersey 1.NBT.C.5
New Mexico 1.NBT.C.5
New York NY-1.NBT.5
North Carolina NC.1.NBT.5
North Dakota 1.NO.CC.2, 1.NO.NBT.5
Ohio 1.NBT.5
Oklahoma K.N.1.7, 1.N.1.6
Oregon 1.NBT.C.5
Pennsylvania CC.2.1.1.B.3
Rhode Island 1.NBT.C.5
South Carolina 1.NR.1.4
South Dakota 1.NBT.C.5
Tennessee 1.NBT.C.6
Texas 111.2.b.2.F, 111.3.b.5.C
Utah 1.NBT.5
Vermont 1.NBT.C.5
Washington 1.NBT.C.5
West Virginia M.1.13
Wisconsin M.1.NBT.C.5

One more, ten more