Home › Class 4th › Maths › Math-Mela › Equal Groups › NCERT Solutions for Class 4th Maths Chapter 9 Hundred-times — Multiples of 100 NCERT Solutions for Class 4th Maths Chapter 9 Hundred-times — Multiples of 100 Book page 142 Updated on2026-09-19
Q1. 100 bikes with 2 people on each have 100 × 2 people = _____ people. 200 bikes with 2 people on each have ______ people. How did you find it?
Answer 100 bikes with 2 people on each. 100 bikes: 100 × 2 = 200 people400 people
How did we find it? We doubled the answer for 100 bikes, because 200 bikes are two hundreds of bikes.
Why it happens: Each extra hundred bikes brings another 200 people, so the count grows in steps of 200.
Q2. 100 cars with 4 people in each have 100 × 4 people = _______ people. 500 cars with 4 people in each have ______ people. How did you find it?
Answer 100 cars with 4 people in each. 100 cars: 100 × 4 = 400 people2000 people
How did we find it? 5 × 4 = 20, and hundred-times 20 is 2000.
Why it happens: 500 groups are 100 times as many as 5 groups, so the answer is 100 times as big and two zeros join at the end.
Q3. 500 × 4 = _____ 100 × 4 = _____ 5 × 4 = _____ 50 × 4 = _____
Answer 100 cars with 4 people in each. Each answer grows from the small fact 5 × 4 = 20.
Why it happens: The group size stays 4. Only the number of groups grows, and it grows in tens and hundreds, so zeros are added to the answer.
Q4. What do you notice about multiplying by multiples of 100s?
Answer We work out the small fact first, then join two zeros at the end.
3 × 4 = 12 → 300 × 4 = 1200
Why it happens: 300 groups are a hundred times as many as 3 groups. Hundred-times moves every digit two places to the left, so two zeros appear in the ones and tens places.
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