(1)2/3 ÷ 5 + 5 ÷ 2/3
问题描述:
(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~
答
(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 ...