计算:(1) 3.8 - 7 ÷ 15 - 2/15 × 4(2)0.6 × 1/15 + 13.4 ÷ 15 + 1/15(3)(8又2/5 -10又1/2 × 4/5 ) ÷ 5又3/4(4) 4又3/5 × 7/9 - 3又3/5 ÷ 1又2/7(5) 2 - ( 2/5 + 2/5 × 3/5) ÷ 8/25(6) 6.3 ×[(1.4 + 1/3 ) ÷
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 22:32:40
![计算:(1) 3.8 - 7 ÷ 15 - 2/15 × 4(2)0.6 × 1/15 + 13.4 ÷ 15 + 1/15(3)(8又2/5 -10又1/2 × 4/5 ) ÷ 5又3/4(4) 4又3/5 × 7/9 - 3又3/5 ÷ 1又2/7(5) 2 - ( 2/5 + 2/5 × 3/5) ÷ 8/25(6) 6.3 ×[(1.4 + 1/3 ) ÷](/uploads/image/z/591030-54-0.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9A%EF%BC%881%EF%BC%89+3.8+-+7+%C3%B7+15+-+2%2F15+%C3%97+4%EF%BC%882%EF%BC%890.6+%C3%97+1%2F15+%2B+13.4+%C3%B7+15+%2B+1%2F15%EF%BC%883%EF%BC%89%EF%BC%888%E5%8F%882%2F5+-10%E5%8F%881%2F2+%C3%97+4%2F5+%EF%BC%89+%C3%B7+5%E5%8F%883%2F4%EF%BC%884%EF%BC%89+4%E5%8F%883%2F5+%C3%97+7%2F9+-+3%E5%8F%883%2F5+%C3%B7+1%E5%8F%882%2F7%EF%BC%885%EF%BC%89+2+-+%EF%BC%88+2%2F5+%2B+2%2F5+%C3%97+3%2F5%EF%BC%89+%C3%B7+8%2F25%EF%BC%886%EF%BC%89+6.3+%C3%97%5B%EF%BC%881.4+%2B+1%2F3+%EF%BC%89+%C3%B7)
计算:(1) 3.8 - 7 ÷ 15 - 2/15 × 4(2)0.6 × 1/15 + 13.4 ÷ 15 + 1/15(3)(8又2/5 -10又1/2 × 4/5 ) ÷ 5又3/4(4) 4又3/5 × 7/9 - 3又3/5 ÷ 1又2/7(5) 2 - ( 2/5 + 2/5 × 3/5) ÷ 8/25(6) 6.3 ×[(1.4 + 1/3 ) ÷
计算:
(1) 3.8 - 7 ÷ 15 - 2/15 × 4
(2)0.6 × 1/15 + 13.4 ÷ 15 + 1/15
(3)(8又2/5 -10又1/2 × 4/5 ) ÷ 5又3/4
(4) 4又3/5 × 7/9 - 3又3/5 ÷ 1又2/7
(5) 2 - ( 2/5 + 2/5 × 3/5) ÷ 8/25
(6) 6.3 ×[(1.4 + 1/3 ) ÷ 1.12 - 1/6 ]
(7) [ 5 - ( 9又1/10 - 4又1/5 )× 5/7 ] ÷ 1又1/2
(8) 6/25 ÷ [(8又4/5 - 6又2/3 ) ÷ 1又1/3] + 0.85
列式计算:
一个数的 1又1/5 倍比 75 的 40% 多 2 求这个数
这些题目能简便的就简便
计算:(1) 3.8 - 7 ÷ 15 - 2/15 × 4(2)0.6 × 1/15 + 13.4 ÷ 15 + 1/15(3)(8又2/5 -10又1/2 × 4/5 ) ÷ 5又3/4(4) 4又3/5 × 7/9 - 3又3/5 ÷ 1又2/7(5) 2 - ( 2/5 + 2/5 × 3/5) ÷ 8/25(6) 6.3 ×[(1.4 + 1/3 ) ÷
(1) 3.8 - 7 ÷ 15 - 2/15 × 4
=3.8-(7/15+8/15)=3.8-1=2.8
(2)0.6 × 1/15 + 13.4 ÷ 15 + 1/15
=(0.6+13.4+1)/15=1
(3)(8又2/5 -10又1/2 × 4/5 ) ÷ 5又3/4
= [42/5-(21/2)*94/5)]*(4/23)
=0*(4/23)=0
(4) 4又3/5 × 7/9 - 3又3/5 ÷ 1又2/7
=(23/5)*(7/9)-(18/5)*(7/9)
=[(23/5)-(18/5)]*(7/9)=7/9
(5) 2 - ( 2/5 + 2/5 × 3/5) ÷ 8/25
=2-(2/5)*(1+3/5)*(25/8)
=2-(2/5)*(8/5)*(25/8)
=2-2=0
(6) 6.3 ×[(1.4 + 1/3 ) ÷ 1.12 - 1/6 ]
=(63/10)*[(7/5+1/3)*(25/28)-1/6]
=(63/10)*(7/5)*(25/28)+(63/10)*(1/3)*(25/28)+(63/10)*(1/6)
=63/8+15/8-21/20
=78/8-21/20=8.7
搞那么多才那么点分,谁回给答啊,劳动成果啊
写得很不明白。。。
不想做 太浪费时间