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Need help on mental math

Need help on mental math
asked 225k views
4 votes
Need help on mental math

Need help on mental math-example-1
asked
User STerrier
by
7.7k points

1 Answer

2 votes
(7x4)x 10 = 280
(7x4)x 100 = 2800
(7x4)x 1000 = 28000
answered
User Amol Bavannavar
by
7.6k points
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