x/6 = 4/5 x 15/6
x/6 = 2
x/6 = 12/6
=> x = 12
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tính bằng cách thuận tiện nhất:
( 2/3 x 4/5) x 5/6 (4/5 + 5/4) x 3/4 27/12 + 17/6 - 25/36 - 15/6
5/6 + 5/8 + 3/4
12/15 + 3 + 3/5
4/3 x 7/8 x 5
8/9 x 6/5 : 3
7/12 + 5/8 x 4/3 - 3/4
(8/5 - 7/6) : 13/15 + 1/4
Điền dấu : >,<,=
a,5/3 x 7/10 .... 5/7 : 7/10
b, 4/5 x 5/6 ..... 8/9 : 4/3
c, 5/11 x 33/15 ..... 6/17 x 34/25
d, 15/19 x 38/5 ..... 15/16 : 3/8
Mong mn làm giúp ạ
Tính nhanh:
a, 5/6 x 4/5 + 4/5 x 1/6 + 4/5
b, 60 x (7/12 + 4/15)
Xin lời giải chi tiết ạ
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Đọc tiếp
4 5. 4. 6.
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15 6. 5. 7
3. 4. 2. 5
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4 5. 4. 6.
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15 6. 5. 7
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4 5. 4. 6.
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15 6. 5. 7
3. 4. 2. 5
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5. 20. 5. 12
4 5. 4. 6.
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15 6. 5. 7
3. 4. 2. 5
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5. 20. 5. 12
4 5. 4. 6.
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15 6. 5. 7
3. 4. 2. 5
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5. 20. 5. 12
4 5. 4. 6.
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4 5. 4. 6.
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5. 20. 5. 12
2/4 + 5/4 x 9
tính nhanh 4/12 x 5/15 x 6/9
Bài 1 : Tính bằng hai cách
a) ( 6/11 + 5/11 ) x 3/7 =
b) 3/5 x 7/9 - 3/5 x 2/9 =
c) ( 6/7 - 4/7 ) : 2/5 =
d) 8/15 : 2/11 + 7/15 : 2/11 =
Bài 2 : Tính
a) 2 x 3 x4/3 x 4 x 5 =
b) 2/3 x 3/4 x 4/5 : 1/5 =
c) 1 x 2 x 3 x 4 / 5 x 6 x 7 x8 =
d) 2/5 x 3/4 x 5/6 : 3/4 =
Bài 2. Tính bằng cách thuận tiện nhất.
( 2/3 x 4/5 ) x 5/6
(4/5 + 5/4 ) x 3/4
11/23 + 2/23 + 9/23 + 18/23
27/12 + 17/6 - 25/36 - 15/6
a, 4/6 - (6/15 +1/5)
b, 2/3 - x= 8/21
c,x: 1/7 =6/7
d, 2-x =1/9 +2/3