题目内容
下面各题,怎样简便就怎样算.
| 3520-468÷18 | 380×99+380 | 6.85-(0.92+0.85) | ||||||||||||||||||
|
24×(
|
|
分析:(1)先算除法,再算减法;
(2)根据乘法分配律进行计算;
(3)根据连减的性质进行计算;
(4)根据乘法分配律进行计算;
(5)根据乘法分配律进行计算;
(6)先算减法,再算除法,最后算乘法.
(2)根据乘法分配律进行计算;
(3)根据连减的性质进行计算;
(4)根据乘法分配律进行计算;
(5)根据乘法分配律进行计算;
(6)先算减法,再算除法,最后算乘法.
解答:解:
(1)3520-468÷18,
=3520-26,
=3494;
(2)380×99+380,
=380×(99+1),
=380×100,
=38000;
(3)6.85-(0.92+0.85),
=6.85-0.92-0.85,
=6.85-0.85-0.92,
=6-0.92,
=5.08;
(4)
÷7+
×
,
=
×
+
×
,
=(
+
)×
,
=
;
(5)24×(
+
+
),
=24×
+24×
+24×
,
=4+16+8,
=20+8,
=28;
(6)
×[4÷(
-
)],
=
×[4÷
],
=
×
,
=1.
(1)3520-468÷18,
=3520-26,
=3494;
(2)380×99+380,
=380×(99+1),
=380×100,
=38000;
(3)6.85-(0.92+0.85),
=6.85-0.92-0.85,
=6.85-0.85-0.92,
=6-0.92,
=5.08;
(4)
| 8 |
| 13 |
| 1 |
| 7 |
| 5 |
| 13 |
=
| 8 |
| 13 |
| 1 |
| 7 |
| 1 |
| 7 |
| 5 |
| 13 |
=(
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 7 |
=
| 1 |
| 7 |
(5)24×(
| 1 |
| 6 |
| 2 |
| 3 |
| 1 |
| 3 |
=24×
| 1 |
| 6 |
| 2 |
| 3 |
| 1 |
| 3 |
=4+16+8,
=20+8,
=28;
(6)
| 11 |
| 60 |
| 4 |
| 3 |
| 3 |
| 5 |
=
| 11 |
| 60 |
| 11 |
| 15 |
=
| 11 |
| 60 |
| 60 |
| 11 |
=1.
点评:此题主要考查分数、整数、小数的四则混合运算的运算顺序和应用运算定律进行简便计算.
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