\(\dfrac{1}{2}+\dfrac{5}{6}+\dfrac{11}{12}+\dfrac{19}{20}=\dfrac{16}{5}\)
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\(\dfrac{1}{2}+\dfrac{5}{6}+\dfrac{11}{12}+\dfrac{19}{20}=\dfrac{16}{5}\)
Tính nhanh tổng sau : 1/2+5/6+11/12+19/20+29/30+41/42+55/56+71/72+89/90
Tính nhanh tổng sau :
1/2+5/6+11/12+19/20+29/30+41/42+55/56+71/72+89/90
tính nhanh tổng sau:
A=1/2+5/6+11/12+19/20+29/30+41/42
a, 13/19 + 1 - 15/19 - 4/19
b, 3/5 +6/11 +7/13 +2/5 +16/11 +19/13
c, 1/3 +1/6 + 1/12 +1/24 +1/48
d, 1/2 +1/6 +1/12 +1/20 +1/30 +1/42
TÍNH NHANH
1/2 + 5/6 + 11/12 + 19/20 + 29/30
1/2+5/6+11/12+19/20+......+89/90
C=1/2+5/6+11/12+19/20+....+89/90 = ?
1) 1/2 + 5/6 + 11/12 + 19/20 + 29/30 + 41/42 + 55/56
tính 12 phân số sau đây:
1/2 + 5/6 + 11/12 + 19/20 + 29/30 + 41/42 + .....