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Multiplication Trick for a Table

15*100+7*100+...

Question

15100+7100+23*100
I don't know how to do this

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Solution

Dear Student,

15 × 100 + 7 × 100 + 23 × 100

=100 × (15 + 7 + 23) [Distributive law]

=100 × 45

= 4500

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