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Question

Write the following in the usual form.

i) 100×8+10×5+9

ii) 10000×1+100×5+10×2

iii) 1000×5+10×1+3

iv) 100000×3+1000×1+10×3 [4 MARKS]

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Solution

Concept: 0.5 Mark each
Application: 0.5 Mark each

i) 100×8+10×5+9

=800+50+9

=859

ii) 10000×1+100×5+10×2

=10000+500+20

=10520

iii) 1000×5+10×1+3

=5000+10+3

=5013

iv) 100000×3+1000×1+10×3

=300000+1000+30

=301030

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