唔該比麻個步驟
1.(+22)-[(+13)-(-41)]
2.[(-21)+(-1)]-(-12)
3.(+92)-(-72)+(-24)
2006-10-17 15:04:42 · 3 個解答 · 發問者 Sze Wing 1 in 教育與參考 ➔ 小學及中學教育
1.
(+22)-[(+13)-(-41)]
= 22 - 13 - 41.
= -32
2.
[(-21)+(-1)]-(-12)
= -21 - 1 +12
-10
3.
(+92)-(-72)+(-24)
= 92 + 72 - 24
= 140
2006-10-17 15:07:25 · answer #1 · answered by J 7 · 0⤊ 0⤋
1.
(+22)-[(+13)-(-41)]
= 22 - 13 - 41.
= -32
2.
[(-21)+(-1)]-(-12)
= -21 - 1 +12
-10
3.
(+92)-(-72)+(-24)
= 92 + 72 - 24
= 140
2006-10-17 15:15:30 · answer #2 · answered by leung 1 · 0⤊ 0⤋
即可任意+-1個先
2006-10-17 15:09:06 · answer #3 · answered by EvA 2 · 0⤊ 0⤋