dien dau va giai thich ben duoi
5/6...... 6/5
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1/3........3/4
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15/17.......1515/1717
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9/10..........10/11
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dien dau va giai thich
5/6......6/5
1/3.......3/4
15/17.......1515/1717
9/10......10/11
dien dau thich hop vao cho cham (> , < , = )
a ) 3 2/3 ....... 3 2/9
b) 2 4/5 ....... 27/10
c ) 17/5 ......... 3 2/6
ai nhanh va dung thi mk tk
2=5
3=10
4=17
5=?
tim quy luat va dien so thich hop vao dau hoi
4+1=5
2+5=12
3+6=21
8+11=?
tim quy luat va dien so thich hop vao dau hoi
1) tinh tổng 1+2+3+4+5+6+7+8+9+10 2) thay đôi môt số dấu + bang dâu - , để kêt quả bang 5 ? 3) giai thich tai sao không thể thay dau +, - để kêt quả bang 0?
Tim cac phan so bang nhau trong cac phan so sau Va giai thich vi sao chung bang nhau. 15/17, 28/42 , 1515/1717 , 65/117, 38/57 , 20/36
1, Dien dau <>= va giai thich vi sao lai dien dau do :
1a,26 + 4,b4 +5,7c ........... a,bc + 19,99
mik xin cac bn lam bai nay chinh vao toi nay thu 5 /6/12/2018
dien dau thich hop
1 2 3 4 5 6 7 8 9 = 100
chi co + - x :
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10
2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20
1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19
