题目内容
计算下面各题,能简便计算的要简便计算.
22+76÷4
3.5×10.1
-
+
2-
-
-
-
+
.
22+76÷4
3.5×10.1
7 |
8 |
4 |
7 |
1 |
8 |
2-
5 |
12 |
7 |
12 |
5 |
11 |
3 |
4 |
1 |
4 |
6 |
11 |
考点:分数的加法和减法,小数乘法
专题:运算顺序及法则
分析:(1)先算除法,再算加法;
(2)根据乘法分配律进行简算;
(3)根据加法交换律进行简算;
(4)根据减法的性质进行简算;
(5)根据加法交换律和结合律进行简算.
(2)根据乘法分配律进行简算;
(3)根据加法交换律进行简算;
(4)根据减法的性质进行简算;
(5)根据加法交换律和结合律进行简算.
解答:
解:(1)22+76÷4
=22+19
=41;
(2)3.5×10.1
=3.5×(10+0.1)
=3.5×10+3.5×0.1
=35+0.35
=35.35;
(3)
-
+
=
+
-
=1-
=
;
(4)2-
-
=2-(
+
)
=2-1
=1;
(5)
-
-
+
=(
+
)-(
+
)
=1-1
=0.
=22+19
=41;
(2)3.5×10.1
=3.5×(10+0.1)
=3.5×10+3.5×0.1
=35+0.35
=35.35;
(3)
7 |
8 |
4 |
7 |
1 |
8 |
=
7 |
8 |
1 |
8 |
4 |
7 |
=1-
4 |
7 |
=
3 |
7 |
(4)2-
5 |
12 |
7 |
12 |
=2-(
5 |
12 |
7 |
12 |
=2-1
=1;
(5)
5 |
11 |
3 |
4 |
1 |
4 |
6 |
11 |
=(
5 |
11 |
6 |
11 |
3 |
4 |
1 |
4 |
=1-1
=0.
点评:考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
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