Toán tính hợp lí 1-2-3+4+5-6-7+8+…….+100+101-102-103+104+105 28/11/2021 By Nevaeh tính hợp lí 1-2-3+4+5-6-7+8+…….+100+101-102-103+104+105
1-2-3+4+5-6-7+8+…….+100+101-102-103+104+105 = (1-2-3+4)+(5-6-7+8) + … + (97-98-99+100)+(101-102-103+104)+ 105 = 0 + 0 + … + 0 + 0 +105 = 105 Trả lời
Đáp án: 1-2-3+4+5-6-7+8+…….+100+101-102-103+104+105 =(1-2-3+4)+(5-6-7+7)+…+(101-102-103+104)+105 =[(1-2-3+4)+(5-6-7+7)+…+(101-102-103+104)]+105 =0+105 =105 Trả lời
1-2-3+4+5-6-7+8+…….+100+101-102-103+104+105
= (1-2-3+4)+(5-6-7+8) + … + (97-98-99+100)+(101-102-103+104)+ 105
= 0 + 0 + … + 0 + 0 +105
= 105
Đáp án:
1-2-3+4+5-6-7+8+…….+100+101-102-103+104+105
=(1-2-3+4)+(5-6-7+7)+…+(101-102-103+104)+105
=[(1-2-3+4)+(5-6-7+7)+…+(101-102-103+104)]+105
=0+105
=105