February 2019 0 27 Report
Oblicz. 12*23, 99*6, 42*25, 56*15, 73*18, 14*98 , 8*998, 8*1002, 12*620 to ma być takim sposobem : 8*12=8*(10+2)=80+16=96 lub 7*39=7*(40-1)=280-7=273
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