Can you do these without a calculator?

Without using a calculator, or an abacus for that matter, can you solve these sample sums from the National Abacus and Mental Arithmetic Competition held in Dubai?

Without using a calculator, or an abacus for that matter, can you solve these sample sums from the National Abacus and Mental Arithmetic Competition held in Dubai? Hundreds of children can do 200 in eight minutes.

Published: May 17, 2013 04:00 AM

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