What this lesson shows
87 − 25: 80 − 20 = 60 and 7 − 5 = 2, so 62.
The worked example
The lesson works this one step by step: 87 − 25 = □. Then your kid tries one like it on paper.
The steps
- Tens and ones
- Take away the ones
- Take away the tens
- What is left?
Helping at home
Show the first number in tens and ones. Take away the ones, then the tens, and say what is left.
If your kid gets stuck
Take the ones, then the tens.
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.B.5
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
Matches a standard in all 50 states and DCSee each state's code
- Alabama MA19.2.10
- Alaska 2.NBT.5
- Arizona 2.NBT.B.5
- Arkansas 2.CAR.2
- California 2.NBT.B.5
- Colorado 2.NBT.B.5
- Connecticut 2.NBT.B.5
- Delaware 2.NBT.B.5
- District of Columbia 2.NBT.B.5
- Florida MA.2.NSO.2.3
- Georgia 2.NR.2.3, 2.NR.2.4
- Hawaii 2.NBT.B.5
- Idaho 2.NBT.B.5
- Illinois 2.NBT.B.5
- Indiana 2.CA.3
- Iowa 2.NBT.B.5
- Kansas 2.NBT.5
- Kentucky KY.2.NBT.5
- Louisiana 2.NBT.B.5
- Maine 2.NBT.B.5
- Maryland 2.NOS.B.6.c, 2.NOS.C.8.a, 2.NOS.C.8.b
- Massachusetts 2.NBT.B.5
- Michigan 2.NBT.B.5
- Minnesota 2.1.2.3, 2.1.2.4
- Mississippi 2.NBT.5
- Missouri 2.NBT.B.6, 2.NBT.B.9
- Montana MT.1.NBT.6, MT.2.NBT.5
- Nebraska 1.N.4.g, 2.N.4.b
- Nevada 2.NBT.B.5
- New Hampshire 2.NBT.B.5
- New Jersey 2.NBT.B.5
- New Mexico 2.NBT.B.5
- New York NY-2.NBT.5
- North Carolina NC.2.NBT.5.a, NC.2.NBT.5.c
- North Dakota 2.NO.NBT.3, 2.NO.NBT.4, 2.AR.OA.2
- Ohio 2.NBT.5
- Oklahoma 2.N.2.4
- Oregon 2.NBT.B.5
- Pennsylvania CC.2.1.2.B.3
- Rhode Island 2.NBT.B.5
- South Carolina 2.PAFR.1.4, 2.PAFR.1.1
- South Dakota 2.NBT.B.5
- Tennessee 1.NBT.C.7, 2.NBT.B.5, 2.OA.B.2
- Texas 111.4.b.4.B
- Utah 2.NBT.5
- Vermont 2.NBT.B.5
- Virginia 2.CE.1a, 2.CE.1b
- Washington 2.NBT.B.5
- West Virginia M.2.10
- Wisconsin M.2.NBT.B.5
- Wyoming 2.NBT.5