
脱式计算(能简算的要简算①5.05-2.83-0.17②[1-(133-74×
脱式计算(能简算的要简算①5.05-2.83-0.17②[1-(133-74×2)]÷52③518×(74+83+134+43)④(137+26)÷13....
脱式计算(能简算的要简算①5.05-2.83-0.17②[1-(133-74×2)]÷52③518×(74+83+134+43)④(137+26)÷13.
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(1)5.05-2.83-0.17
=5.05-(2.83+0.17)
=5.05-3
=2.05;
(2)[1-(
-
×2)]÷
=[1-(
-
)]÷
=[1-
]÷
=
÷
=
;
(3)
×(
+
+
+
)
=
×[(
+
)+(
+
)]
=
×[5+4]
=
×9
=2.5;
(4)(
+26)÷13
=
×
+26×
=
+2
=2
.
=5.05-(2.83+0.17)
=5.05-3
=2.05;
(2)[1-(
13 |
3 |
7 |
4 |
5 |
2 |
=[1-(
13 |
3 |
7 |
2 |
5 |
2 |
=[1-
5 |
6 |
5 |
2 |
=
1 |
6 |
5 |
2 |
=
1 |
15 |
(3)
5 |
18 |
7 |
4 |
8 |
3 |
13 |
4 |
4 |
3 |
=
5 |
18 |
7 |
4 |
13 |
4 |
8 |
3 |
4 |
3 |
=
5 |
18 |
=
5 |
18 |
=2.5;
(4)(
13 |
7 |
=
13 |
7 |
1 |
13 |
1 |
13 |
=
1 |
7 |
=2
1 |
7 |
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