What this lesson shows
The 4 in 4, 40, and 400, then in 0.4 and 0.04: one place left is 10 times as much, one place right is 1/10.
The worked example
The lesson works this one step by step: the 4 in 400 and in 0.04. Then your kid tries one like it on paper.
The steps
- Find the place
- One place right: 1/10
- One place left: 10 times
Helping at home
A digit one place to the right is worth one tenth as much; one place to the left, 10 times as much. It works the same on both sides of the point: 4 tens, 4 ones, 4 tenths.
If your kid gets stuck
Find each digit’s place in a chart.
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 5.NBT.A.1
Recognize that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left.
Matches standards in 47 statesSee each state's code
- Alaska 5.NBT.1
- Arizona 5.NBT.A.1 *
- Arkansas 5.NPV.1
- California 5.NBT.A.1
- Colorado 5.NBT.A.1
- Connecticut 5.NBT.A.1
- Delaware 5.NBT.A.1
- District of Columbia 5.NBT.A.1
- Florida MA.5.NSO.1.1
- Georgia 5.NR.1.1
- Hawaii 5.NBT.A.1
- Idaho 5.NBT.A.1
- Illinois 5.NBT.A.1
- Iowa 5.NBT.A.1
- Kansas 5.NBT.1
- Kentucky KY.5.NBT.1
- Louisiana 5.NBT.A.1
- Maine 5.NBT.A.1
- Maryland 5.NOS.A.1
- Massachusetts 5.NBT.A.1
- Michigan 5.NBT.A.1
- Mississippi 5.NBT.1
- Missouri 5.NBT.A.3
- Montana MT.5.NBT.1, 5.D4.4
- Nebraska 5.N.1.b
- Nevada 5.NBT.A.1
- New Hampshire 5.NBT.A.1
- New Jersey 5.NBT.A.1
- New Mexico 5.NBT.A.1
- New York NY-5.NBT.1
- North Carolina NC.5.NBT.1.a
- North Dakota 5.NO.NBT.1
- Ohio 5.NBT.1
- Oregon 5.NBT.A.1
- Pennsylvania CC.2.1.5.B.1
- Rhode Island 5.NBT.A.1
- South Carolina 5.NR.1.2
- South Dakota 5.NBT.A.1
- Tennessee 5.NBT.A.1
- Texas 111.6.b.2.A
- Utah 5.NBT.1
- Vermont 5.NBT.A.1
- Virginia 4.NS.4a, 4.NS.4d
- Washington 5.NBT.A.1
- West Virginia M.5.4
- Wisconsin M.5.NBT.A.1
- Wyoming 5.NBT.1