2 дм2 30 см2+ 7дм2 90см2

Question

2 дм2 30 см2+ 7дм2 90см2

Answer 1

2 дм² 30см²+ 7дм² 90см²=10дм² 20см²

Comments

спаисба)

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нажми спасибо)

Answer 2

2*100*30+7*100*90=6000+63000=69000 см^2=690дм^2