题目内容
计算
0.125×32
9.2+3
+4.4+
570-9856÷32
4
×
+4
÷7
(4
-3
)×(4-2
)
[(
+2.6)×
]÷
.
0.125×32
9.2+3
3 |
5 |
4 |
5 |
570-9856÷32
4
9 |
11 |
6 |
7 |
9 |
11 |
(4
1 |
2 |
3 |
10 |
1 |
3 |
[(
2 |
5 |
7 |
9 |
1 |
3 |
考点:整数、分数、小数、百分数四则混合运算,整数四则混合运算,运算定律与简便运算
专题:运算顺序及法则,运算定律及简算
分析:(1)根据乘法结合律进行简算;
(2)根据加法交换律和结合律进行简算;
(3)先算除法,再算减法;
(4)根据乘法分配律进行简算;
(5)先算减法,再算乘法;
(6)先算加法,再算乘法,最后算除法.
(2)根据加法交换律和结合律进行简算;
(3)先算除法,再算减法;
(4)根据乘法分配律进行简算;
(5)先算减法,再算乘法;
(6)先算加法,再算乘法,最后算除法.
解答:
解:(1)0.125×32
=0.125×(8×4)
=(0.125×8)×4
=1×4
=4;
(2)9.2+3
+4.4+
=(9.2+
)+(3
+4.4)
=10+8
=18;
(3)570-9856÷32
=570-308
=262;
(4)4
×
+4
÷7
=4
×
+4
×
=4
×(
+
)
=4
×1
=4
;
(5)(4
-3
)×(4-2
)
=1
×1
=2;
(6)[(
+2.6)×
]÷
=[3×
]÷
=
÷
=7.
=0.125×(8×4)
=(0.125×8)×4
=1×4
=4;
(2)9.2+3
3 |
5 |
4 |
5 |
=(9.2+
4 |
5 |
3 |
5 |
=10+8
=18;
(3)570-9856÷32
=570-308
=262;
(4)4
9 |
11 |
6 |
7 |
9 |
11 |
=4
9 |
11 |
6 |
7 |
9 |
11 |
1 |
7 |
=4
9 |
11 |
6 |
7 |
1 |
7 |
=4
9 |
11 |
=4
9 |
11 |
(5)(4
1 |
2 |
3 |
10 |
1 |
3 |
=1
1 |
5 |
2 |
3 |
=2;
(6)[(
2 |
5 |
7 |
9 |
1 |
3 |
=[3×
7 |
9 |
1 |
3 |
=
7 |
3 |
1 |
3 |
=7.
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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