题目内容
简算
12.04-5.37-4.63
24×(
+
-
)
0.25×62+
+37÷4
7
-2.83+2
-0.17.
12.04-5.37-4.63
24×(
| 1 |
| 6 |
| 1 |
| 4 |
| 1 |
| 3 |
0.25×62+
| 1 |
| 4 |
7
| 5 |
| 6 |
| 1 |
| 6 |
考点:运算定律与简便运算
专题:运算定律及简算
分析:(1)运用减法的性质进行简算;
(2)运用乘法的分配律进行简算;
(3)把除以4化成乘以
,再运用乘法的分配律进行简算;
(4)运用加法的交换律、结合律及减法的性质进行简算.
(2)运用乘法的分配律进行简算;
(3)把除以4化成乘以
| 1 |
| 4 |
(4)运用加法的交换律、结合律及减法的性质进行简算.
解答:
解:(1)12.04-5.37-4.63
=12.04-(5.37+4.63)
=12.04-10
=2.04;
(2)24×(
+
-
)
=24×
+24×
-24×
=4+6-8
=10-8
=2;
(3)0.25×62+
+37÷4
=0.25×62+
+37×
=(62+37+1)×
=100×
=25;
(4)7
-2.83+2
-0.17
=7
+2
-0.17-2.83
=(7
+2
)-(0.17+2.83)
=10-3
=7.
=12.04-(5.37+4.63)
=12.04-10
=2.04;
(2)24×(
| 1 |
| 6 |
| 1 |
| 4 |
| 1 |
| 3 |
=24×
| 1 |
| 6 |
| 1 |
| 4 |
| 1 |
| 3 |
=4+6-8
=10-8
=2;
(3)0.25×62+
| 1 |
| 4 |
=0.25×62+
| 1 |
| 4 |
| 1 |
| 4 |
=(62+37+1)×
| 1 |
| 4 |
=100×
| 1 |
| 4 |
=25;
(4)7
| 5 |
| 6 |
| 1 |
| 6 |
=7
| 5 |
| 6 |
| 1 |
| 6 |
=(7
| 5 |
| 6 |
| 1 |
| 6 |
=10-3
=7.
点评:本题主要考查了学生在四则混合运算中灵活运用简便算法的计算能力.
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