Toán Lớp 5: 1+2+3+4+5+6+…+99
giải nhanh cho mik nha
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Toán Lớp 5: 1+2+3+4+5+6+…+99
giải nhanh cho mik nha
Comments ( 2 )
DREAMMARKER
= (1 + 99) + (2 + 98) + … + (49 + 51) + 50
= 100 + 100 + … + 100 + 50
= 98 : 2 × 100 + 50
= 49 × 100 + 50
= 4950