脱式计算,能简算的要简算.(1)( 5 6 + 7 12 + 3 8 )÷ 1
作者:未知侠名时间:2022-11-21 09:07:46
(1)(
5
6 +
7
12 +
3
8 )÷
1
48 ,
=(
5
6 +
7
12 +
3
8 )×48,
=
5
6 ×48+
7
12 ×48+
3
8 ×48,
=40+28+18,
=86;
(2)[1-(
1
2 +
1
3 )×
1
5 ]÷
5
6 ,
=[1-(
3
6 +
2
6 )×
1
5 ]×
6
5 ,
=[1-
5
6 ×
1
5 ]×
6
5 ,
=[1-
1
6 ]×
6
5 ,
=
5
6 ×
6
5 ,
=1;
(3)6.46-(5.37-3.54),
=6.46-5.37+3.54,
=(6.46+3.54)-5.37,
=10-5.37,
=4.63;
(4)5.58-
3
5 +5.42-
2
5 ,
=(5.58+5.42)-(
3
5 +
2
5 ),
=11-1,
=10. -2/6
5
6 +
7
12 +
3
8 )÷
1
48 ,
=(
5
6 +
7
12 +
3
8 )×48,
=
5
6 ×48+
7
12 ×48+
3
8 ×48,
=40+28+18,
=86;
(2)[1-(
1
2 +
1
3 )×
1
5 ]÷
5
6 ,
=[1-(
3
6 +
2
6 )×
1
5 ]×
6
5 ,
=[1-
5
6 ×
1
5 ]×
6
5 ,
=[1-
1
6 ]×
6
5 ,
=
5
6 ×
6
5 ,
=1;
(3)6.46-(5.37-3.54),
=6.46-5.37+3.54,
=(6.46+3.54)-5.37,
=10-5.37,
=4.63;
(4)5.58-
3
5 +5.42-
2
5 ,
=(5.58+5.42)-(
3
5 +
2
5 ),
=11-1,
=10. -2/6
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