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Glossary

Base Year

The base year is the reference period against which all other values are compared in an index number, and its index is set to 100. Changes are measured relative to this year, so choosing a stable, typical base year makes comparisons meaningful and easy to interpret.

Meaning

The base year is the reference period against which all other values are compared in an index number, and its index is set to 100. Changes are measured relative to this year, so choosing a stable, typical base year makes comparisons meaningful and easy to interpret.

Where it appears in Add Math

You meet Base Year in the Index Numbers chapter of SPM Additional Mathematics. Knowing the term precisely matters in the exam: questions often hinge on reading a keyword correctly, and because SPM marking is analytic, using the right definition in your working helps secure method marks.

Our teachers make sure a student can not only recite what Base Year means but use it fluently in a full solution.

The term in three languages

Because the SPM Add Math paper is bilingual (BM/EN), it helps to know this term in each language: Base Year (EN) · Tahun Asas (BM) · 基年 (中文)

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Written by the spmaddmath.com.my editorial team.· Last updated 5 September 2026

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