题目内容
脱式计算,能简算的要简算.
475+660÷33×25 | 400-14
| ||||||||||
(
|
5.84×1.36+1.36×3.16+1.36 | ||||||||||
[1.9-6÷(2.4×5)]÷(14×0.2) | [(
|
分析:按四则运算顺序解答
解答:解:475+660÷33×25
=475+20×25
=475+500
=975;
(
+
-
)×36
=
×36+
×36-
×36
=20+
-33
=18.5
[1.9-6÷(2.4×5)]÷(14×0.2)
=[1.9-6÷12]÷2.8
=[1.9-0.5]÷2.8
=1.4÷2.8
=0.5
400-14
-85
=400-(14
+85
)
=400-100
=300;
5.84×1.36+1.36×3.16+1.36
=1.36×(5.84+3.16+1)
=1.36×10
=13.6;
[(
+
)×
-
]÷
=[(
+
)×
-
]×12
=[
×
+
×
-
]×12
=[
+1-
]×12
=
×12+1×12-
×12
=8+12-3
=17.
=475+20×25
=475+500
=975;
(
5 |
9 |
7 |
8 |
11 |
12 |
=
5 |
9 |
7 |
8 |
11 |
12 |
=20+
63 |
2 |
=18.5
[1.9-6÷(2.4×5)]÷(14×0.2)
=[1.9-6÷12]÷2.8
=[1.9-0.5]÷2.8
=1.4÷2.8
=0.5
400-14
13 |
27 |
14 |
27 |
=400-(14
13 |
27 |
14 |
27 |
=400-100
=300;
5.84×1.36+1.36×3.16+1.36
=1.36×(5.84+3.16+1)
=1.36×10
=13.6;
[(
8 |
9 |
4 |
3 |
3 |
4 |
1 |
4 |
1 |
12 |
=[(
8 |
9 |
4 |
3 |
3 |
4 |
1 |
4 |
=[
8 |
9 |
3 |
4 |
4 |
3 |
3 |
4 |
1 |
4 |
=[
2 |
3 |
1 |
4 |
=
2 |
3 |
1 |
4 |
=8+12-3
=17.
点评:按四则运算法则解题,能用规律简算的可以简算.
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