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Estimeaza produsele rotunjind convenabil Exemplu 149×5=? 795×4 = ? 150×5=750 800×4=320. 249×3 198×4 295×5. 635×6. 888×7

Răspuns :

149x5=745=750
795x4=3180=3200
249x3=747=750
198x4=792=800
295x5=1475=1500
635x6=3810=3800
888x7=6216=6200