(1)2/3 ÷ 5 + 5 ÷ 2/3(2)5 × 5/6 + 5/6 × 5(3)3/8 × 68 - 1/8 ÷ 1/68(4)( 26 ÷ 13/24 ) ÷ 13(5) 1又3/5 - 5/12 × ( 1/4 - 1/2 × 1/2)(6) 4/15 ×( 5/7 - 3/14 ÷ 3/4 )(7) 11/15 + ( 3/4 - 2/3 )÷ 1/5(8)
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(1)2/3 ÷ 5 + 5 ÷ 2/3(2)5 × 5/6 + 5/6 × 5(3)3/8 × 68 - 1/8 ÷ 1/68(4)( 26 ÷ 13/24 ) ÷ 13(5) 1又3/5 - 5/12 × ( 1/4 - 1/2 × 1/2)(6) 4/15 ×( 5/7 - 3/14 ÷ 3/4 )(7) 11/15 + ( 3/4 - 2/3 )÷ 1/5(8)
(1)2/3 ÷ 5 + 5 ÷ 2/3
(2)5 × 5/6 + 5/6 × 5
(3)3/8 × 68 - 1/8 ÷ 1/68
(4)( 26 ÷ 13/24 ) ÷ 13
(5) 1又3/5 - 5/12 × ( 1/4 - 1/2 × 1/2)
(6) 4/15 ×( 5/7 - 3/14 ÷ 3/4 )
(7) 11/15 + ( 3/4 - 2/3 )÷ 1/5
(8) 4又1/2 + ( 1/2 + 3/4 ) × 1.2
(9) ( 1又3/8 × 2/11 - 2/30 ) ÷ 1.4
(10) (0.34 × 7.8 )÷ ( 0.65 × 0.68 )
谁能帮我解答下啊 我会给他加分的~
这些题目能简便的就简便哦~
(1)2/3 ÷ 5 + 5 ÷ 2/3(2)5 × 5/6 + 5/6 × 5(3)3/8 × 68 - 1/8 ÷ 1/68(4)( 26 ÷ 13/24 ) ÷ 13(5) 1又3/5 - 5/12 × ( 1/4 - 1/2 × 1/2)(6) 4/15 ×( 5/7 - 3/14 ÷ 3/4 )(7) 11/15 + ( 3/4 - 2/3 )÷ 1/5(8)
(1) 2/3 ÷ 5 + 5 ÷ 2/3
= 2/3 × 1/5 + 5 × 3/2
= 2/15 + 15/2
= 4/30 + 225/30
= 229/30
(2) 5 × 5/6 + 5/6 × 5
= 5/6 × ( 5 + 5 )
= 5/6 × 10
= 25/3
(3) 3/8 × 68 - 1/8 ÷ 1/68
= 3/8 × 68 - 1/8 × 68
= 68 × ( 3/8 - 1/8 )
= 68 × 1/4
= 17
(4)( 26 ÷ 13/24 ) ÷ 13
=( 26 × 24/13 ) × 1/13
= 48 × 1/13
= 48/13
(5) 1又3/5 - 5/12 × ( 1/4 - 1/2 × 1/2)
= 1又3/5 - 5/12 × ( 1/4 - 1/4 )
= 1又3/5
(6) 4/15 ×( 5/7 - 3/14 ÷ 3/4 )
= 4/15 ×( 5/7 - 3/14 × 4/3 )
= 4/15 ×( 5/7 - 2/7 )
= 4/15 × 3/7
= 4/35
(7) 11/15 + ( 3/4 - 2/3 )÷ 1/5
= 11/15 + 1/12 × 5
= 11/15 + 5/12
= 44/60 + 25/60
= 23/20
(8) 4又1/2 + ( 1/2 + 3/4 ) × 1.2
= 4又1/2 + 5/4 × 1.2
= 4又1/2 + 1又1/2
= 6
(9)( 1又3/8 × 2/11 - 2/30 ) ÷ 1.4
=( 11/8 × 2/11 - 2/30 ) ÷ 1.4
=( 1/4 - 1/15 ) ÷ 1.4
=( 15/60 - 4/60 )× 7/5
= 11/60 × 7/5
= 11/84
(10)(0.34 × 7.8 )÷ ( 0.65 × 0.68 )
= 2.652 ÷ 0.442
= 6
1. 229/30
2. 25/3
3. 17
4. 1.5
5. 1.6
6. 12/35
7. 23/20
8. 15/4
9. 11/84
10. 6