
下面各题怎样算简便就怎样算.175×28+2013÷30 &...
下面各题怎样算简便就怎样算.175×28+2013÷304.08+5.13-3.08+4.870.75×8.6+34÷5735÷[78?(12+316)]....
下面各题怎样算简便就怎样算.175×28+2013÷30 4.08+5.13-3.08+4.870.75×8.6+34÷5735÷[78?(12+316)].
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(1)175×28+2013÷30
=4900+67.1
=4967.1;
(2)4.08+5.13-3.08+4.87
=(4.08-3.08)+(5.13+4.87)
=1+10
=11;
(3)0.75×8.6+
÷
=0.75×8.6+0.75×
=0.75×(8.6+
)
=0.75×10
=7.5;
(4)
÷[
?(
+
)]
=
÷[
-
]
=
÷
=
.
=4900+67.1
=4967.1;
(2)4.08+5.13-3.08+4.87
=(4.08-3.08)+(5.13+4.87)
=1+10
=11;
(3)0.75×8.6+
3 |
4 |
5 |
7 |
=0.75×8.6+0.75×
7 |
5 |
=0.75×(8.6+
7 |
5 |
=0.75×10
=7.5;
(4)
3 |
5 |
7 |
8 |
1 |
2 |
3 |
16 |
=
3 |
5 |
7 |
8 |
11 |
16 |
=
3 |
5 |
3 |
16 |
=
16 |
5 |
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