Multiplication, division, fractions, decimals, angles & more — every Grade 4 skill in quiz format!
Fourth grade is the year mathematics becomes genuinely complex. Multi-digit multiplication, long division with remainders, adding and subtracting fractions, decimals to hundredths, place value to the millions, classifying geometric figures by their properties, and converting measurement units all appear for the first time. EcosystemForKids.com covers every one of these skills across 18 carefully constructed quiz games — each generating fresh randomised questions every session.
Standard 4.NBT.B.5 requires multiplication of a multi-digit number by a 1-digit number and two 2-digit numbers. Our Multi-Digit Multiply! quiz generates 2×2 and 3×1 digit problems with three carefully chosen wrong answers.
Standard 4.NBT.B.6 requires finding whole-number quotients and remainders with up to 4-digit dividends and 1-digit divisors. Our Long Division! quiz presents division problems and asks for the correct quotient and remainder.
Standard 4.OA.B.4 asks children to find all factor pairs of a number from 1 to 100 and recognise prime and composite numbers. Our Factor Finder! quiz covers all these concepts with questions that require careful systematic thinking rather than recall alone.
Standard 4.NF.B.3 extends fraction operations to addition and subtraction with like denominators, including mixed numbers. Our Add & Subtract Fractions! quiz covers all sub-types including adding fractions that sum beyond 1.
Standard 4.NF.B.3c requires children to convert between mixed numbers and improper fractions. Our Mixed Number Magic! quiz presents both conversion directions with visual fraction bar models.
Standard 4.NF.B.4 asks children to multiply a fraction by a whole number, understanding this as repeated addition. Our Multiply Fractions! quiz covers this operation with simplification required.
Standard 4.NF.C.6 introduces decimal notation for fractions with denominators of 10 or 100. Our Decimal Place Value! quiz asks children to identify the value of specific digits in decimal numbers.
Standard 4.NF.C.7 requires comparing two decimals to hundredths by reasoning about their size. Our Compare Decimals! quiz uses >, <, and = with carefully chosen pairs that expose common misconceptions such as assuming more digits means a larger number.
Standard 4.NBT.A.1 and 4.NBT.A.2 extend place value understanding to 6 and 7-digit numbers. Our Millions Master! quiz asks children to identify digit values and read numbers in word form.
Standard 4.MD.C.5 introduces angle measurement. Our Angle Ace! quiz displays SVG angle diagrams and asks children to classify the angle type and estimate its measure in degrees.
Standard 4.G.A.1 requires children to draw and identify points, lines, line segments, rays, angles, and parallel and perpendicular lines. Our Lines & Rays! quiz uses clear SVG diagrams for each type.
Standard 4.MD.A.1 asks children to know relative sizes of measurement units and convert within a single system. Our Unit Converter! quiz covers customary and metric conversions for length, mass, and capacity.
Standard 4.MD.A.3 extends area to figures that can be decomposed into rectangles. Our Area of Complex Shapes! quiz displays L-shaped and stepped SVG figures with labelled dimensions and asks for total area.
Standard 4.MD.B.4 requires children to make a line plot to display a data set with measurements in fractions of a unit. Our Line Plot! quiz displays a pre-built line plot and asks several question types about the data.
Standard 4.OA.C.5 asks children to generate and analyse patterns. Our Pattern Detective! quiz presents sequences with rules involving all four operations and asks children to identify the rule and predict the next term.
Standard 4.NF.C.6 requires expressing fractions with denominators 10 and 100 as decimals and vice versa. Our Fraction ↔ Decimal! quiz tests both conversion directions with commonly confused pairs.
Standard 4.NBT.A.3 extends rounding to any place value up to 1,000,000. Our Round Large Numbers! quiz generates 4 and 5-digit numbers and asks for rounding to specified places.
Standard 4.OA.A.3 asks children to solve multi-step word problems using all four operations. Our Problem Solver! quiz includes two-step problems requiring careful identification of the operations involved.
Explore our full series: Preschool, Kindergarten, Grade 1, Grade 2, Grade 3, and our full games library.