Ten more, a hundred more: 2nd grade math lesson

What this lesson shows

10 more than 428 is 438 and 10 less is 418. 100 more is 528 and 100 less is 328.

The worked example

The lesson works this one step by step: 428. Then your kid tries one like it on paper.

The steps

10 more: tens up 1
10 less: tens down 1
100 more: hundreds up 1
100 less: hundreds down 1

Helping at home

10 more or less changes only the tens digit, by 1. 100 more or less changes only the hundreds digit, by 1. The other digits stay the same.

If your kid gets stuck

Which digit changes?

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.B.8
Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.

Matches standards in 48 statesSee each state's code

Alabama MA19.2.13
Alaska 2.NBT.8
Arizona 2.NBT.B.8
Arkansas 2.NPV.4
California 2.NBT.B.8
Colorado 2.NBT.B.8
Connecticut 2.NBT.B.8
Delaware 2.NBT.B.8
District of Columbia 2.NBT.B.8
Florida MA.2.NSO.2.2
Georgia 2.NR.2.2
Hawaii 2.NBT.B.8
Idaho 2.NBT.B.8
Illinois 2.NBT.B.8
Iowa 2.NBT.B.8
Kansas 2.NBT.8
Kentucky KY.2.NBT.8
Louisiana 2.NBT.B.8
Maine 2.NBT.B.8
Maryland 2.NOS.C.10
Massachusetts 2.NBT.B.8
Michigan 2.NBT.B.8
Minnesota 2.1.1.3, 3.1.1.3
Mississippi 2.NBT.8
Missouri 2.NBT.B.10
Montana MT.2.NBT.8
Nebraska 2.N.4.c
Nevada 2.NBT.B.8
New Hampshire 2.NBT.B.8
New Jersey 2.NBT.B.8
New Mexico 2.NBT.B.8
New York NY-2.NBT.8
North Carolina NC.2.NBT.8
North Dakota 2.NO.NBT.5
Ohio 2.NBT.2, 2.NBT.8
Oklahoma 2.N.1.4, 3.N.1.3
Oregon 2.NBT.B.8
Rhode Island 2.NBT.B.8
South Carolina 2.NR.1.4
South Dakota 2.NBT.B.8
Tennessee 2.NBT.C.8
Texas 111.4.b.7.B
Utah 2.NBT.8
Vermont 2.NBT.B.8
Virginia 2.NS.1e, 2.NS.1f
Washington 2.NBT.B.8
West Virginia M.2.13
Wisconsin M.2.NBT.B.8

Ten more, a hundred more