811+12=...
Những câu hỏi liên quan
Tính
a
.
2
5
+
3
4
b
.
2
5
+
3
10
-
1
2
c
.
8
11
+
8
33
×
3
4
Đọc tiếp
Tính
a . 2 5 + 3 4
b . 2 5 + 3 10 - 1 2
c . 8 11 + 8 33 × 3 4
a . 2 5 + 3 4 = 8 20 + 15 20 = 23 20
b . 2 5 + 3 10 - 1 2 = 4 10 + 3 10 - 1 2 = 7 10 - 1 2 = 7 10 - 5 10 = 2 10 = 1 5
c . 8 11 + 8 33 × 3 4 = 8 11 + 24 132 = 8 11 - 2 11 = 6 11
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Tính các tổng sau:
a) 2 + 8 11 + 3 11
b) 1 2 + 1 3 + 1 6
a) 2 + 8 11 + 3 11 = 2.11 + 8 + 3 11 = 33 11 = 3
b) 1 2 + 1 3 + 1 6 = 1.3 + 1.2 + 1 6 = 6 6 = 1
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Tính các tổng sau:
a
)
1
+
8
11
+
3
11
;
b
)
1
2
+
1
5...
Đọc tiếp
Tính các tổng sau:
a ) 1 + 8 11 + 3 11 ; b ) 1 2 + 1 5 + 1 10 ; c ) 1 2 + − 3 5 + 1 10 + 2 5 ; d ) 1 2 + 1 3 + 1 4 + 1 5 + 1 6
Tìm x
a) 4 5 . x = 4 7
b) 3 4 : x = 1 2
c) x : 8 11 = 11 3
a)
4 5 . x = 4 7 x = 4 7 : 4 5 x = 4 7 . 5 4 x = 5 7
b)
3 4 : x = 1 2 x = 3 4 : 1 2 x = 3 4 .2 x = 3 2
c)
x : 8 11 = 11 3 x = 11 3 . 8 11 x = 8 3
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$\frac{3}{2}+\frac{13}{6}+\frac{37}{12}+\frac{81}{20}+\frac{151}{30}+\frac{253}{42}+\frac{393}{56}+\frac{577}{72}+\frac{811}{90}$
Bn xem Telex của bn có bị lỗi ko nhé.
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\(\dfrac{3}{2}+\dfrac{13}{6}+\dfrac{37}{12}+\dfrac{81}{20}+\dfrac{151}{30}+\dfrac{253}{42}+\dfrac{393}{56}+\dfrac{577}{72}+\dfrac{811}{90}\)
\(\dfrac{3}{2}+\dfrac{13}{6}+\dfrac{37}{12}+\dfrac{81}{20}+\dfrac{151}{30}+\dfrac{253}{42}+\dfrac{393}{56}+\dfrac{577}{72}+\dfrac{811}{90}\)
\(=\dfrac{459}{10}\)
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\(\dfrac{3}{2}+\dfrac{13}{6}+\dfrac{37}{12}+\dfrac{81}{20}+\dfrac{151}{30}+\dfrac{253}{42}+\dfrac{393}{56}+\dfrac{577}{72}+\dfrac{811}{90}\)\(=\dfrac{2}{2}+\dfrac{1}{2}+\dfrac{12}{6}+\dfrac{1}{6}+\dfrac{36}{12}+\dfrac{1}{12}+\dfrac{80}{20}+\dfrac{1}{20}+\dfrac{150}{30}+\dfrac{1}{30}+\dfrac{252}{42}+\dfrac{1}{42}+\dfrac{392}{56}+\dfrac{1}{56}+\dfrac{576}{72}+\dfrac{1}{72}+\dfrac{810}{90}+\dfrac{1}{90}\)\(=1+\dfrac{1}{2}+2+\dfrac{1}{6}+3+\dfrac{1}{12}+4+\dfrac{1}{20}+5+\dfrac{1}{30}+6+\dfrac{1}{42}+7+\dfrac{1}{56}+8+\dfrac{1}{72}+9+\dfrac{1}{90}\)\(=\left(1+2+3+4+5+6+7+8+9\right)+\left(\dfrac{1}{2}+\dfrac{1}{6}+\dfrac{1}{12}+\dfrac{1}{20}+\dfrac{1}{30}+\dfrac{1}{42}+\dfrac{1}{56}+\dfrac{1}{72}+\dfrac{1}{90}\right)\)= 45 + \(\dfrac{9}{10}\)
= \(\dfrac{459}{10}\)
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\(\dfrac{3}{2}+\dfrac{13}{6}+\dfrac{37}{12}+\dfrac{81}{20}+\dfrac{151}{30}+\dfrac{253}{42}+\dfrac{393}{56}+\dfrac{393}{56}+\dfrac{577}{72}+\dfrac{811}{90}\)
\(\dfrac{3780+5460+7770+10206+12684+15180+17685+20195+22708}{2520}\)=\(\dfrac{115668}{2520}=\dfrac{459}{10}\)
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> ; = ; < ?
c ) 8 11 . . . 24 33
Tính: 8 11 + 8 33 x 3 4
Tính 4 7 : 8 11
