Grade 4 Lesson plan
Coldwick Hatchery Raceways: Adding Eighths of a Foot of Water
A grade 4 lesson at a fictional fish hatchery where students add and subtract eighths of a foot to keep four concrete raceways at their correct water depth.
Common Core Math · Grade 4
4.NF.B.3 Add and subtract fractions with like denominators
Understand a fraction a/b with a > 1 as a sum of fractions 1/b, and add and subtract mixed numbers with like denominators; solve word problems involving addition and subtraction of fractions referring to the same whole and having like denominators.
Why water teaches this standard well
Students add fractional liters measured in graduated cylinders during a classroom water-quality lab, combining thirds or fourths of a liter from several samples into one total. Adding same-denominator fractions here is the arithmetic behind combining partial lab measurements into a full data set.
Materials tagged with this code are written to the full standard , and each carries a written note explaining the alignment. See how we review materials.
7 materials aligned to 4.NF.B.3
Lesson plans
Grade 4 Lesson plan
Pellwater Reservoir's Dry Summer: Reading the Gauge as Decimals
A grade 4 lesson where students rewrite a fictional reservoir's gauge readings as tenths and hundredths, then compare two drops written as decimals.
Grade 4 Lesson plan
Thornbury's Rain Gauge Study: A Line Plot and Fraction Lesson
A grade 4 lesson where a fictional class plots two weeks of rain gauge readings in eighths of an inch, then adds and subtracts fractions to find totals and differences.
Worksheets
Grade 4 Worksheet
Juniper Dam Test Tank: Adding and Subtracting Fractions
A grade 4 worksheet at the fictional Juniper Dam where students add and subtract fourths and eighths, including mixed numbers, to track a test tank and lake level.
Math problem sets
Grade 4 Math problem set
Ashmill's New Filter Bed: Layer Depths in Tenths of a Foot
A grade 4 problem set at a fictional water plant where students add and subtract tenths of a foot and write filter layer depths as decimals.
Grade 4 Math problem set
Quarrytown Well Field: A Line Plot of Eighths of a Foot
A grade 4 problem set where students build a line plot from twelve well readings in eighths of a foot, then add and subtract fractions and mixed numbers.
Grade 4 Math problem set
Rain Gauge Records at Larkspur Elementary: A Fraction Problem Set
A grade 4 problem set where students read a week of rain gauge data in eighths of an inch, add and subtract the fractions, and connect the total to groundwater recharge.