Đáp án:
Giải thích các bước giải:
` 5/13+-5/17+-20/41+8/13+-21/41 `
` ( 5/13 + 8 / 13 ) + ( -20/41 + -21 / 41 ) + 5/17 `
` 1 + (-1) + 5/17 `
` 5/17 `
` -5/9+8/15+-2/11+4/-9+7/15 `
` ( -5 / 9 + 4 / - 9 ) + ( 8 /15 + 7/15 ) + 2/11 `
` ( -1) + 1 + 2/11 `
` 2/11 `
` 8/3×2/5×3/8×10×11/92 `
` ( 8/3 . 3/8 ) . ( 2/5 . 10 ) . 11/92 `
` 1 . 4 . 11/92 `
` 11/23 `
` 2/7+-3/8+11/7+1/3+1/7+5/-8 `
` ( 2/7 + 11/7 + 1/7 ) + ( - 3 / 8 + 5/-8 ) + 1/3 `
` 14 / 7 + ( -1 ) + 1/3 `
` 2/1 + ( -1) + 1/3 `
` 2 + ( -1) + 1/3 `
` 4/3 `