August 2018 1 56 Report
Korzystając z równości 3 i 12/31 * 248 = 840, oblicz w pamięci iloczyny : 6 i 24/31 * 248, 3 i 12/31 * 124 i 3 i 12/31 * 249.

6 i 24/31 * 248 = 1680
3 i 12/31 * 124 = 420
3 i 12/31 * 249 = 843 i 12/31
napiszcie mi objaśnienia.
pliss!!!

szkoła podstawowa klasa 5.
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