
计算下面各题,能简便计算的要用简便方法算.0.4÷(0.3×2-0.4)23×511+611÷329.7-3.79+1.3-6
计算下面各题,能简便计算的要用简便方法算.0.4÷(0.3×2-0.4)23×511+611÷329.7-3.79+1.3-6.2167÷[(67-38)×89]....
计算下面各题,能简便计算的要用简便方法算.0.4÷(0.3×2-0.4)23×511+611÷329.7-3.79+1.3-6.2167÷[(67-38)×89].
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(1)0.4÷(0.3×2-0.4)
=0.4÷(0.6-0.4)
=0.4÷0.2
=2
(2)
×
+
÷
=
×
+
×
=
×(
+
)
=
×1
=
(3)9.7-3.79+1.3-6.21
=9.7+1.3-(3.79+6.21)
=11-10
=1
(4)
÷[(
?
)×
]
=
÷[
×
]
=
÷
=2
=0.4÷(0.6-0.4)
=0.4÷0.2
=2
(2)
2 |
3 |
5 |
11 |
6 |
11 |
3 |
2 |
=
2 |
3 |
5 |
11 |
6 |
11 |
2 |
3 |
=
2 |
3 |
5 |
11 |
6 |
11 |
=
2 |
3 |
=
2 |
3 |
(3)9.7-3.79+1.3-6.21
=9.7+1.3-(3.79+6.21)
=11-10
=1
(4)
6 |
7 |
6 |
7 |
3 |
8 |
8 |
9 |
=
6 |
7 |
27 |
56 |
8 |
9 |
=
6 |
7 |
3 |
7 |
=2
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