What this lesson shows
One number in standard, expanded, and word form, period by period.
The worked example
The lesson works this one step by step: 352,817. Then your kid tries one like it on paper.
The steps
- Read it by periods
- Add what each digit is worth
- Or digit times place
- Words: each period, then its name
Helping at home
Read the number by its periods first: the thousands before the comma, the ones after it. For expanded form, write what each digit is worth and add them, skipping any 0. For words, read each period like a small number and say its name.
If your kid gets stuck
Find the comma, then read each period.
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 4.NBT.A.2
Read and write multi-digit whole numbers using base-ten numerals, number names, and expanded form. Compare two multi-digit numbers based on meanings of the digits in each place, using >, =, and < symbols to record the results of comparisons.
Matches a standard in all 50 states and DCSee each state's code
- Alabama MA19.4.7, MA19.4.8
- Alaska 4.NBT.2
- Arizona 4.NBT.A.2
- Arkansas 4.NPV.2, 4.NPV.4
- California 4.NBT.A.2
- Colorado 4.NBT.A.2
- Connecticut 4.NBT.A.2
- Delaware 4.NBT.A.2
- District of Columbia 4.NBT.A.2
- Florida MA.4.NSO.1.2, MA.4.NSO.1.3
- Georgia 4.NR.1.1, 4.NR.1.3
- Hawaii 4.NBT.A.2
- Idaho 4.NBT.A.2
- Illinois 4.NBT.A.2
- Indiana 4.NS.1
- Iowa 4.NBT.A.2
- Kansas 4.NBT.2
- Kentucky KY.4.NBT.2.a, KY.4.NBT.2.b
- Louisiana 4.NBT.A.2
- Maine 4.NBT.A.2
- Maryland 4.NOS.A.1.a, 4.NOS.A.1.c
- Massachusetts 4.NBT.A.2
- Michigan 4.NBT.A.2
- Minnesota 3.1.1.1, 3.1.1.2, 3.1.1.5
- Mississippi 4.NBT.2
- Missouri 3.NBT.A.2, 4.NBT.A.2, 4.NBT.A.3
- Montana MT.4.NBT.2, 4.D1.4, 4.D1.10
- Nebraska 4.N.1.a, 4.N.1.b
- Nevada 4.NBT.A.2
- New Hampshire 4.NBT.A.2
- New Jersey 4.NBT.A.2
- New Mexico 4.NBT.A.2
- New York NY-4.NBT.2.a, NY-4.NBT.2.b
- North Carolina NC.4.NBT.2, NC.4.NBT.7
- North Dakota 4.NO.CC.1, 4.NO.NBT.2
- Ohio 4.NBT.2
- Oklahoma 3.N.1.1, 3.N.1.2, 3.N.1.4, 4.N.1.1, 4.N.1.2, 4.N.1.4
- Oregon 4.NBT.A.2
- Pennsylvania CC.2.1.4.B.1
- Rhode Island 4.NBT.A.2
- South Carolina 3.NR.1.3, 4.NR.1.3, 4.NR.1.1, 3.NR.1.1
- South Dakota 4.NBT.A.2.a, 4.NBT.A.2.b
- Tennessee 4.NBT.A.2, 3.NBT.A.4
- Texas 111.5.b.2.A, 111.5.b.2.D, 111.6.b.2.B, 111.6.b.2.C
- Utah 4.NBT.2
- Vermont 4.NBT.A.2
- Virginia 3.NS.1a, 3.NS.1b, 4.NS.1a, 4.NS.1b, 4.NS.1c, 4.NS.2a, 4.NS.2b
- Washington 4.NBT.A.2
- West Virginia M.4.7
- Wisconsin M.4.NBT.A.2
- Wyoming 4.NBT.2