脱式计算①9028-(4028+523)-477②878-[8-(2.125-0.125÷18)]③318÷[(4512-31324)×47+(3118-2712)×11017]④(1-12×2)(1

题目简介

脱式计算①9028-(4028+523)-477②878-[8-(2.125-0.125÷18)]③318÷[(4512-31324)×47+(3118-2712)×11017]④(1-12×2)(1

题目详情

脱式计算
①9028-(4028+523)-477  
②8
7
8
-[8-(2.125-0.125÷
1
8
)]
③3
1
8
÷[(4
5
12
-3
13
24
)×
4
7
+(3
1
18
-2
7
12
)×1
10
17
]
④(1-
1
2×2
)(1-
1
3×3
)(1-
1
4×4
)…(1-
1
2001×2001
题型:解答题难度:中档来源:不详

答案

(1)9028-(4028+523)-477
=(9028-4028)-(523+477),
=5000-1000,
=4000;

(2)8class="stub"7
8
-[8-(2.125-0.125÷class="stub"1
8
)]
=8class="stub"7
8
-
[8-(2class="stub"1
8
-class="stub"1
8
÷class="stub"1
8
)],
=8class="stub"7
8
-
[8-(2class="stub"1
8
-1)],
=8class="stub"7
8
-
[8-1class="stub"1
8
],
=8class="stub"7
8
+1class="stub"1
8
-8,
=10-8
=2;

(3)3class="stub"1
8
÷[(4class="stub"5
12
-3class="stub"13
24
)×class="stub"4
7
+(3class="stub"1
18
-2class="stub"7
12
)×1class="stub"10
17
]
=class="stub"25
8
÷[(class="stub"53
12
-class="stub"85
24
)×class="stub"4
7
+(class="stub"55
18
-class="stub"31
12
)×class="stub"27
17
],
=class="stub"25
8
÷[class="stub"21
24
×class="stub"4
7
+class="stub"17
36
×class="stub"27
17
],
=class="stub"25
8
÷[class="stub"1
2
+class="stub"3
4
],
=class="stub"25
8
×class="stub"4
5

=class="stub"5
2


(4)(1-class="stub"1
2×2
)(1-class="stub"1
3×3
)(1-class="stub"1
4×4
)…(1-class="stub"1
2001×2001

=class="stub"1×3
2×2
×class="stub"2×4
3×3
×class="stub"3×5
4×4
×…×class="stub"1999×2001
2000×2000
×class="stub"2000×2002
2001×2001

=class="stub"1
2
×class="stub"2002
2001

=class="stub"1001
2001

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