🌳 The Math Xone · Grade 5 · Decimals & Data
Grade 5 maths, one door at a time.
Open a chapter door, read the concepts on the whiteboard, then walk the corridor and solve the questions to clear it. 17 doors in all.
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The Grade 5 doors
Each door is one chapter of the maths syllabus. Clear a door to earn stars; your stars are saved on this device.
Door 1
Large Numbers & Place Value
1 lakh = 1,00,000; 1 crore = 1,00,00,000; 1 million = 1,000,000
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Door 2
Multi-Digit Multiplication
Multiply by the ones, then the tens, and add the partial products
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Door 3
Long Division
Long division: Divide, Multiply, Subtract, Bring down — repeat
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Door 4
Factors, Multiples, HCF & LCM
A factor divides exactly; a multiple is the times-table
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Door 5
Place Value with Decimals (Thousandths)
Decimal point separates whole from part
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Door 6
Decimal Operations
Line up the decimal points before adding or subtracting
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Door 7
Operations with Fractions (Unlike Denominators)
Find common denominator before adding/subtracting
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Door 8
Multiplying Fractions
'Fraction of' an amount means multiply
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Door 9
Percentages
% means "out of 100"
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Door 10
Ratio & Proportion
A ratio compares two quantities, written a : b
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Door 11
Order of Operations (PEMDAS/BODMAS)
Parentheses FIRST
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Door 12
Volume
Volume is the space inside a 3-D shape, measured in cubic units (cm³, m³, ...)
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Door 13
Perimeter & Area
Perimeter = distance around a shape; add all sides
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Door 14
Metric & Customary Conversion
Large unit → Small unit: MULTIPLY
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Door 15
Coordinate Plane (1st Quadrant)
Coordinate plane has x-axis (horizontal) and y-axis (vertical)
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Door 16
Classifying 2D Figures
Quadrilateral = any 4-sided polygon
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Door 17
Line Plots & Mean
Mean = total ÷ number of items
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Prefer to read first? Browse all the Grade 5 concepts, or check your progress.