What this lesson shows
Fixes a mistake
117 ÷ 24 rounded to 120 ÷ 20 says 6, but 6 × 24 = 144 is too much. Step down to 4.
The worked example
The lesson works this one step by step: 1,176 ÷ 24. Then your kid tries one like it on paper.
The steps
- Round to guess
- Multiply to check
- Step down until it fits
Helping at home
A guess from rounding is only a start. Multiply the guess by the divisor before writing it: if the product is too big, try one less; if what is left is as big as the divisor, try one more.
If your kid gets stuck
Multiply to check each guess before you write it.
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.B.6
Find whole-number quotients of whole numbers with up to four-digit dividends and two-digit divisors, using strategies based on place value, the properties of operations, and/or the relationship between multiplication and division. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.
Matches standards in 50 statesSee each state's code
- Alabama MA19.5.7
- Alaska 5.NBT.6
- Arizona 5.NBT.B.6
- Arkansas 5.CAR.2
- California 5.NBT.B.6
- Colorado 5.NBT.B.6
- Connecticut 5.NBT.B.6
- Delaware 5.NBT.B.6
- District of Columbia 5.NBT.B.6
- Florida MA.5.NSO.2.2
- Georgia 5.NR.2.2
- Hawaii 5.NBT.B.6
- Idaho 5.NBT.A.6.a, 5.NBT.A.6.b
- Illinois 5.NBT.B.6
- Indiana 5.CA.1
- Iowa 5.NBT.B.6
- Kansas 5.NBT.6
- Kentucky KY.5.NBT.6.a, KY.5.NBT.6.b
- Louisiana 5.NBT.B.6
- Maine 5.NBT.B.6
- Maryland 5.NOS.B.5.b, 5.NOS.B.5.c, 5.NOS.B.5.d
- Massachusetts 5.NBT.B.6
- Michigan 5.NBT.B.6
- Minnesota 4.1.1.6, 5.1.1.1
- Mississippi 5.NBT.6
- Missouri 5.NBT.A.8
- Montana MT.5.NBT.6, 5.D3.3
- Nebraska 5.A.1.b
- Nevada 5.NBT.B.6
- New Hampshire 5.NBT.B.6
- New Jersey 5.NBT.B.6
- New Mexico 5.NBT.B.6
- New York NY-5.NBT.6
- North Carolina NC.5.NBT.6
- North Dakota 5.NO.NBT.6
- Ohio 5.NBT.6
- Oklahoma 5.N.2.2, 5.N.2.3
- Oregon 5.NBT.B.6
- Pennsylvania CC.2.1.5.B.2
- Rhode Island 5.NBT.B.6
- South Carolina 5.PAFR.1.2
- South Dakota 5.NBT.B.6
- Tennessee 5.NBT.B.6
- Texas 111.7.b.3.C
- Utah 5.NBT.6
- Vermont 5.NBT.B.6
- Virginia 5.CE.1b.i, 5.CE.1b.ii, 5.CE.1b.iii, 5.CE.1b.iv
- Washington 5.NBT.B.6
- West Virginia M.5.9
- Wisconsin M.5.NBT.B.6