What this lesson shows
Fixes a mistake
A line from 200 to 220 can be as long as one from 0 to 1,000. The labels tell the size.
The worked example
The lesson works this one step by step: 210 on a line from 200 to 220. Then your kid tries one like it on paper.
The steps
- Same length, different labels
- Read both ends
- Then place the number
Helping at home
Read the numbers at both ends of the line first. Find the middle number between them, then decide if your number is before or after it.
If your kid gets stuck
Read both ends first.
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.
Standards
- Common Core 2.NBT.A.4
Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.
Matches a standard in all 50 states and DCSee each state's code
- Alabama MA19.2.9
- Alaska 2.NBT.4
- Arizona 2.NBT.A.4
- Arkansas 2.NPV.5
- California 2.NBT.A.4
- Colorado 2.NBT.A.4
- Connecticut 2.NBT.A.4
- Delaware 2.NBT.A.4
- District of Columbia 2.NBT.A.4
- Florida MA.2.NSO.1.3
- Georgia 2.NR.1.3
- Hawaii 2.NBT.A.4
- Idaho 2.NBT.A.4
- Illinois 2.NBT.A.4
- Indiana 2.NS.5
- Iowa 2.NBT.A.4
- Kansas 2.NBT.4
- Kentucky KY.2.NBT.4
- Louisiana 2.NBT.A.4
- Maine 2.NBT.A.4
- Maryland 2.NOS.A.4, 2.NOS.A.5
- Massachusetts 2.NBT.A.4
- Michigan 2.NBT.A.4
- Minnesota 2.1.1.5
- Mississippi 2.NBT.4
- Missouri 2.NBT.A.5
- Montana MT.2.NBT.4
- Nebraska 2.N.3.c
- Nevada 2.NBT.A.4
- New Hampshire 2.NBT.A.4
- New Jersey 2.NBT.A.4
- New Mexico 2.NBT.A.4
- New York NY-2.NBT.4
- North Carolina NC.2.NBT.4
- North Dakota 2.NO.NBT.2
- Ohio 2.NBT.4
- Oklahoma 2.N.1.7
- Oregon 2.NBT.A.4
- Pennsylvania CC.2.1.2.B.1
- Rhode Island 2.NBT.A.4
- South Carolina 2.NR.3.1
- South Dakota 2.NBT.A.4
- Tennessee 2.NBT.A.4
- Texas 111.4.b.2.C, 111.4.b.2.D, 111.4.b.2.E, 111.4.b.2.F
- Utah 2.NBT.4
- Vermont 2.NBT.A.4
- Virginia 2.NS.2f, 2.NS.2g, 2.NS.2h
- Washington 2.NBT.A.4
- West Virginia M.2.9
- Wisconsin M.2.NBT.A.4
- Wyoming 2.NBT.4
More in this unit
- Numbers to 1,000 three ways
- What is a digit worth?
- Zero holds the tens place
- Many names for one number
- New names, same number
- Comparing three-digit numbers
- Plot and order on a number line
- Same digits, different places
- Ten more, a hundred more
- Ten more past a hundred
- Adding to 1,000
- Subtracting to 1,000
- Subtraction does not turn around
- Trade only when you need to
- Skip-count past a hundred
- Counting by 25s
- Which estimate makes sense?