Page 46 - Start Up Mathematics_5

3. Each letter a, b, c here stands for a number.

a a a
× a a a
a a a
a a a 0
a a a 0 0
a b c b a

Take a = 1, then find what the numbers b and c will be.
4. 976 children are going on a picnic. They will be taken in mini buses. If 25 children can
go in one bus, how many buses do they need?

Two children have solved it. Check if they have made a mistake—correct it. Discuss.

25 9 7 6 5 + 10 + 10 + 10 + 4 25 9 7 6 20 + 10 + 9 + 1

–1 2 5 –5 0 0
8 5 1 4 7 6
–2 5 0 –2 5 0
6 0 1 2 2 6
–2 5 0 –2 1 5

3 5 1 1 1
–2 5 0 Ans. We need 39 buses.
1 0 1

–1 0 0
×

Ans. We need 40 buses.

5. Each line gives a story. You have to choose the question which makes the best story
problem.

(a) 352 children from a school went on a camping trip. Each tent had a group of
4 children.

(i) How many children did each tent have?

(ii) How many tents do they need?

(iii) How many children in all are in
the school?

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