Toán tính nhanh 1/2+2/8+3/28+4/77+5/176+6/352 02/09/2021 By Genesis tính nhanh 1/2+2/8+3/28+4/77+5/176+6/352
Đáp án + Giải thích các bước giải: `1/2+2/8+3/28+4/77+5/176+6/352` `= 1/1.2 + 2/2.4 + 3/4.7 + 4/7.11 + 5/11.16 + 6/16.22` ` = 1/1 – 1/2 + 1/2 – 1/4 + 1/4 – 1/7 + 1/7 – 1/11 + 1/11 – 1/16 + 1/16 – 1/22` `= 1 – 1/22` ` = 21/22` Trả lời
Đáp án + Giải thích các bước giải:
`1/2+2/8+3/28+4/77+5/176+6/352`
`= 1/1.2 + 2/2.4 + 3/4.7 + 4/7.11 + 5/11.16 + 6/16.22`
` = 1/1 – 1/2 + 1/2 – 1/4 + 1/4 – 1/7 + 1/7 – 1/11 + 1/11 – 1/16 + 1/16 – 1/22`
`= 1 – 1/22`
` = 21/22`