CBSE · Class 7 · Mathematics · Chapter 1

Large Numbers Around Us

Read, compare, estimate and work with large numbers through real-world quantities and number patterns.

9 lessons 45 min
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Lessons in this chapter

  1. 1Making Sense of a LakhBuild a sense of one lakh through counting, comparisons, and Indian place value.
  2. 2Land of Tens: Building Numbers with Place ValueUse imaginary calculators to discover number representations and efficient regrouping.
  3. 3Crores, Millions, and BillionsTranslate between Indian and International names without changing the number.
  4. 4Exact Values, Rounding, and EstimationChoose useful approximations and check large calculations with bounds and historical data.
  5. 5Multiplication Shortcuts and Product PatternsRegroup factors efficiently and explain what multiplication patterns can tell us.
  6. 6Large Numbers in Facts and Thought ExperimentsTurn huge counts into understandable comparisons by stating assumptions and calculating in stages.
  7. 7Place-value Puzzles and Toothpick DigitsUse place value and clear game rules to solve digit-card, deletion, and toothpick challenges.
  8. 8Counting Digits and Exploring Number NamesCount large writing patterns by blocks and explore the structure of English number names.
  9. 9Chapter Summary and PracticeConnect the whole chapter through mixed examples, reasoning challenges, and the toothpick game.
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