մաթեմաթիկա

853×8= 6824, 6824:8= 853

583×20 = 11660, 11660:583=20

715×32=22880, 22880: 32= 715,

642×210= 134820, 134820: 210= 642

555×9 = 4955

525x 70= 36750

815x 37=30155

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