题目内容
(2005?华亭县)简算
0.37-
+1.63-1
(
+
-
)×4×9 7342×11
+265.8×112.5.
0.37-
1 |
4 |
3 |
4 |
1 |
6 |
1 |
9 |
1 |
12 |
1 |
4 |
分析:(1)运用加法交换律与结合律以及减法的性质简算;
(2)运用乘法分配律简算;
(3)根据数字特点,原式变为7342×11.25+2658×11.25,运用乘法分配律简算.
(2)运用乘法分配律简算;
(3)根据数字特点,原式变为7342×11.25+2658×11.25,运用乘法分配律简算.
解答:解:(1)0.37-
+1.63-1
,
=(0.37+1.63)-(
+1
),
=2-2,
=0;
(2)(
+
-
)×4×9,
=(
+
-
)×36,
=
×36+
×36-
×36,
=6+4-3,
=7;
(3)7342×11
+265.8×112.5,
=7342×11.25+265.8×112.5,
=7342×11.25+2658×11.25,
=(7342+2658)×11.25,
=10000×11.25,
=112500.
1 |
4 |
3 |
4 |
=(0.37+1.63)-(
1 |
4 |
3 |
4 |
=2-2,
=0;
(2)(
1 |
6 |
1 |
9 |
1 |
12 |
=(
1 |
6 |
1 |
9 |
1 |
12 |
=
1 |
6 |
1 |
9 |
1 |
12 |
=6+4-3,
=7;
(3)7342×11
1 |
4 |
=7342×11.25+265.8×112.5,
=7342×11.25+2658×11.25,
=(7342+2658)×11.25,
=10000×11.25,
=112500.
点评:考查了运算定律与简便运算,四则混合运算,灵活运用所学的运算定律进行简便计算.
练习册系列答案
相关题目