Free Online Math Practice for Kids in Grade 3

Master Grade 3 math concepts with guided two-step reasoning for rounding, 3-digit addition/subtraction, multiplication arrays, division, fractions on number lines, elapsed time, area, and perimeter.

Curriculum Unit

Sub-topic / Skill

Reasoning Steps

Topic

✅ Established Information

Goal:

📋 Step-by-Step Logic

🎉

Mastered!

You completed this problem logically and perfectly.

What Your Child Practices in Grade 3 Math

Each problem is generated with fresh numbers and diagrams so students practice real math skills instead of memorizing answers. Learners can answer questions directly or turn on Reasoning Steps to practice choosing the strategy first, with clear explanations for every answer choice. Open any unit below to view all skills covered.

M1 Place value and rounding 3.NBT.A.1 3 skills

Round to the nearest 10
Round to the nearest 100
Value of a circled digit

M2 Add and subtract within 1000 3.NBT.A.2 2 skills

Add within 1000
Subtract within 1000

M3 Multiplication as equal groups and arrays 3.OA.A.1, 3.OA.A.3 3 skills

Equal groups
Arrays
Multiplication word problems

M4 Division as sharing and grouping 3.OA.A.2, 3.OA.A.4, 3.OA.B.6 3 skills

Share equally
Missing factor
Division as inverse

M5 Properties, fluency within 100, multiples of 10 3.OA.B.5, 3.OA.C.7, 3.NBT.A.3 3 skills

Multiplication and division facts
Multiples of 10
Distributive split

M6 Two step problems and patterns 3.OA.D.8, 3.OA.D.9 2 skills

Two-step word problems
Number patterns

M7 Fractions as numbers 3.NF.A.1, 3.NF.A.2, 3.NF.A.2a, 3.NF.A.2b 3 skills

Write the fraction of a bar
Fractions on a number line
Shade a fraction

M8 Equivalent fractions and comparing fractions 3.NF.A.3, 3.NF.A.3a, 3.NF.A.3b, 3.NF.A.3c, 3.NF.A.3d 3 skills

Equivalent fractions
Compare fractions
Whole numbers as fractions

M9 Time to the minute, elapsed time, mass, volume 3.MD.A.1, 3.MD.A.2 3 skills

Read the time to the minute
Elapsed time
Mass and volume

M10 Data: scaled graphs and line plots 3.MD.B.3, 3.MD.B.4 2 skills

Scaled graphs
Line plots

M11 Area 3.MD.C.5, 3.MD.C.5a, 3.MD.C.5b, 3.MD.C.6, 3.MD.C.7, 3.MD.C.7a, 3.MD.C.7b, 3.MD.C.7c, 3.MD.C.7d 3 skills

Count unit squares
Area by length times width
Split an L shape

M12 Perimeter, and area versus perimeter 3.MD.D.8 3 skills

Find the perimeter
Find a missing side
Same perimeter, same area

M13 Shapes and equal shares 3.G.A.1, 3.G.A.2 3 skills

Sort shapes by sides and angles
Name the quadrilaterals
Partition into equal shares

Want paper practice too? Visit our Free Printable Math Practice Worksheets generator to create custom Grade 3 PDF/PNG worksheets with answer keys.