Toán Lớp 5: (10,12+99)+(12,14+99)+(14,16+99)+(16,18+99)+…
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Toán Lớp 5: (10,12+99)+(12,14+99)+(14,16+99)+(16,18+99)+…
Comments ( 2 )
(10,12+99) + (12,14+99) + (14,16+99) + (16,18+99)
= (10,12 + 16,18) + (12,14 + 14,16) + 99
= 26,3 + 26,3 + 99
= 52,6 + 99
= 151,6
(10,12+99)+(12,14+99)+(14,16+99)+(16,18+99)(10,12+99)+(12,14+99)+(14,16+99)+(16,18+99)
= (10,12+16,18)+(12,14+14,16)+99(10,12+16,18)+(12,14+14,16)+99
= 26,3+26,3+9926,3+26,3+99
= 52,6+9952,6+99
= 151,6151,6