What this lesson shows
2,340 is 234 tens. Renaming now makes dividing easier later.
The worked example
The lesson works this one step by step: 2,340 = ? tens. Then your kid tries one like it on paper.
The steps
- Cover the places to the right
- Count what is left
- Multiply back to check
Helping at home
To count tens, cover the ones place: the digits left over are the number of tens. For hundreds, cover the tens and ones, and for thousands, cover three places. Check by multiplying back by 10, 100, or 1,000.
If your kid gets stuck
Cover the places smaller than the unit.
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