NCERT Solutions for Class 4th Maths Chapter 13 Multiples of 10 — Now think and answer
Book page 189 Updated on2026-09-19
Q1. 30 × 10 = _____ 40 × 10 = _____ 70 × 10 = _____ 50 × 10 = _____ 60 × 10 = _____ 80 × 10 = _____
Answer Why it happens: 30 tens is 3 hundreds, because every 10 tens make 1 hundred.
Q2. Let us find the number of people who can travel in 26 tempo travellers. 26 × 10 = ______ travellers.
Answer 26 × 10 = 26 Tens
26 Tens = 20 Tens + 6 Tens
= 200 + 60
= 260 travellers
Why it happens: Each tempo traveller carries 10 people, so 26 of them carry 26 tens.
Note: The English book does not print the seat number; it is given in the picture and in the Hindi edition — 10 people per tempo traveller.
Q3. Answer the following questions. Share your thoughts. a) 21 × 10 = _____ b) 42 × 10 = _____ c) 65 × 10 = _____ d) 38 × 10 = _____ e) 53 × 10 = _____ f) 87 × 10 = _____
Answer Why it happens: Multiplying by 10 pushes every digit one place to the left, and a 0 takes the ones place.
Q4. A small bus can seat 20 people. How many people can be seated in 12 buses?
Answer We have to find 12 × 20. There are three easy ways.
Way 1: 12 × 20 = 10 × 20 and 2 × 20 = 200 + 40 = 240
Way 2: 12 × 20 = 12 × 10 and 12 × 10 = 120 + 120 = 240
Way 3: 12 × 20 = 12 × 2 Tens = 24 Tens = 240
240 people can be seated in 12 buses.
Why it happens: 20 is 2 tens. Twelve twos are 24, so twelve twenties are 24 tens.
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