第一题:2 4 7 12 20 33 54 第二题:8 3 4 1 5 9 6 7 第三题:Mrs black has some cards in her hand.If mary,her daughter ,gives her 24 more ,she will have three time as many .How mang cards does Mrs black have in her hand?第四题:2 15 37 2
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第一题:24712203354第二题:83415967第三题:Mrsblackhassomecardsinherhand.Ifmary,herdaughter,givesher24more,shewi
第一题:2 4 7 12 20 33 54 第二题:8 3 4 1 5 9 6 7 第三题:Mrs black has some cards in her hand.If mary,her daughter ,gives her 24 more ,she will have three time as many .How mang cards does Mrs black have in her hand?第四题:2 15 37 2
第一题:2 4 7 12 20 33 54 第二题:8 3 4 1 5 9 6 7
第三题:Mrs black has some cards in her hand.If mary,her daughter ,gives her 24 more ,she will have three time as many .How mang cards does Mrs black have in her hand?
第四题:2 15 3
7 23 6
第一题:2 4 7 12 20 33 54 第二题:8 3 4 1 5 9 6 7 第三题:Mrs black has some cards in her hand.If mary,her daughter ,gives her 24 more ,she will have three time as many .How mang cards does Mrs black have in her hand?第四题:2 15 37 2
88
2
12
5
第一 2 5题
第一题,1,2,4,
求第一题中的第4,5,7,
第一题2,3,5,8,12,17,23,( ),38.
2、3、4、5、6、7,第一必采纳,一题也行
找规律,第一题 1 4 7 12 23 42 __第二题 2 3 5 7 16 73 __
第一大题2,3,4,5,小题咋做
第一题:2,4,7,16,( ),( ).第二题:5 5 6 9 6 10 12 10 20 40 7 第二题:
第一行数是1,2;第二行数是5,4,3;第三行数是6,7,8,9;第n行第一个数是几第一行数是1,2;第二行数是5,4,3;第三行数是6,7,8,9;第四行数是14,13,12,11,10第n行第一个数是几
20题第一题
第一大题的3,4,5,
4 5题!第一必采
第一题,2题
第一3,4题,
第一,2题?
2题第一空
典例2第一题!
第一题:1+3+5+7+...+107+109-2-4-6-8...-106-108 第二题:5+6-7+8-9+10-11+12-13+...+206-207+208