[計量] 請教一題計量
Mario bought equal numbers of 2 cent and 3 cent stamps. If the total cost the
stamps was $1.00, what was the total number of stamps bought?
答案是:40
但是我怎麼算都只有20,麻煩請高手指導一下,謝!!!
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推
07/29 18:22, , 1F
07/29 18:22, 1F
推
07/29 18:22, , 2F
07/29 18:22, 2F
→
07/29 18:31, , 3F
07/29 18:31, 3F
→
07/29 18:31, , 4F
07/29 18:31, 4F
推
07/29 19:23, , 5F
07/29 19:23, 5F
→
07/29 19:23, , 6F
07/29 19:23, 6F
推
07/29 19:46, , 7F
07/29 19:46, 7F
→
07/29 20:15, , 8F
07/29 20:15, 8F
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