有紙2米,表弟把它剪成3等份,他用其中一份的7∕20做飛機。飛機用了紙多少米?
2006-10-24 15:25:34 · 8 個解答 · 發問者 ? 5 in 科學 ➔ 數學
飛機用了紙 :
2 / 3 x (7 / 20)
= 2 x 7 /3 x 20
= 7 / 3 x 10
= 7 / 30米
2006-10-24 15:28:39 · answer #1 · answered by J 7 · 0⤊ 0⤋
200÷3x7∕20
=23又1分3
2006-10-24 15:44:24 · answer #2 · answered by WAWA 2 · 0⤊ 0⤋
2米的3等份，即是每份=2/3米
用其中一份的7∕20做飛機,即是=2/3米X7/20=14/60米=7/30米
2006-10-24 15:34:06 · answer #3 · answered by ? 2 · 0⤊ 0⤋
2除3乘7∕20=?
2006-10-24 15:32:58 · answer #4 · answered by ? 2 · 0⤊ 0⤋
2/3*7/20
=14/60
=7/30(m)
2006-10-24 15:31:13 · answer #5 · answered by iisdee 2 · 0⤊ 0⤋
(2/3)*(7/20)
=0.23米(3s.f)
2006-10-24 19:30:46 補充：
=1/30
2006-10-24 15:29:35 · answer #6 · answered by Yanki 1 · 0⤊ 0⤋
有紙2米,剪成3等份,即每份 2/3 米
2/3 米的7/20
=2/3 * 7/20
=14/60
=7/30 米
2006-10-24 15:29:32 · answer #7 · answered by Amby 6 · 0⤊ 0⤋
2/3x7/20
=9/60
=3/20
飛機用了紙3/20米
2006-10-24 15:28:37 · answer #8 · answered by ivan 1 · 0⤊ 0⤋