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  • xiaoming goes to five shop and sends all of his money.he only knows in each shop he spends one yuan more than half the m

    xiaoming goes to five shop and sends all of his money.he only knows in each shop he spends one yuan more than half the money before he goes to the shop.How much does he take before he goes shopping?______
    英語人氣:276 ℃時(shí)間:2020-05-16 10:05:44
    優(yōu)質(zhì)解答
    用反推法
    逛完第五個(gè)商店:身上的錢為0
    逛完第四個(gè)商店:身上的錢為(0+1)X2=2
    逛完第三個(gè)商店:身上的錢為(2+1)X2=6
    逛完第二個(gè)商店:身上的錢為(6+1)X2=14
    逛完第一個(gè)商店:身上的錢為(14+1)X2=30
    故,答案是:30yuan
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