数学简算题

来源:百度知道 编辑:UC知道 时间:2024/05/16 20:43:37
1/4÷(1-1/2-1/4)
8/13÷7+1/7*6/13
1÷0.1÷1/10-0.1*1/10
51/43+51*19/43


1/4÷(1-1/2-1/4)
=1/4÷1/4
=1

8/13÷7+1/7*6/13
=8/13÷7+6/13÷7
=(8/13+6/13)÷7
=(14/13)÷7
=2/13

1÷0.1÷1/10-0.1*1/10
=1÷0.1÷0.1-0.1*0.1
=1÷(0.1*0.1)-(0.1*0.1)
=100-1/100
=99又99/100
=99.99

51/43+51*19/43
=1*51/43+51*19/43
=(1+19)*(51/43)
=20*(51/43)
=1020/43

1
2/91
99/100
1020/43

1
14/91
99.99
1020/43

1
2/13
99.99
1020/43

1/4÷(1-1/2-1/4)
=1/4÷(1/2-1/4)
=1/4÷1/4
=1

8/13÷7+1/7*6/13
=8/13*1/7+1/7*6/13
=(1/7)*(8/13+6/13)
=1/7*14/13
=2/13

1÷0.1÷1/10-0.1*1/10
=10*10-0.01
=99.99

51/43+51*19/43
=(51/43)*(1+19)
=51*20/43
=1020/43