计算下列各题.(1)23+16?0.75(2)3.5?123+16(3)
计算下列各题.(1)23+16?0.75(2)3.5?123+16(3)18×5.3+0.125×4.7(4)89×[516×(716?14÷2)]....
计算下列各题.(1)23+16?0.75(2)3.5?123+16(3)18×5.3+0.125×4.7(4)89×[516×(716?14÷2)].
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(1)
+
-0.75,
=
+
-
,
=
;
(2)3.5-1
+
,
=3
-1
+
,
=(3
+
)-1
,
=3
-1
,
=2;
(3)
×5.3+0.125×4.7,
=0.125×5.3+0.125×4.7,
=0.125×(5.3+4.7),
=0.125×10,
=1.25;
(4)
×[
×(
-
÷2)],
=
×[
×(
-
)],
=
×[
×
],
=
×
×
2 |
3 |
1 |
6 |
=
2 |
3 |
1 |
6 |
3 |
4 |
=
1 |
12 |
(2)3.5-1
2 |
3 |
1 |
6 |
=3
1 |
2 |
2 |
3 |
1 |
6 |
=(3
1 |
2 |
1 |
6 |
2 |
3 |
=3
2 |
3 |
2 |
3 |
=2;
(3)
1 |
8 |
=0.125×5.3+0.125×4.7,
=0.125×(5.3+4.7),
=0.125×10,
=1.25;
(4)
8 |
9 |
5 |
16 |
7 |
16 |
1 |
4 |
=
8 |
9 |
5 |
16 |
7 |
16 |
1 |
8 |
=
8 |
9 |
5 |
16 |
5 |
16 |
=
8 |
9 |
5 |
16 |
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