题目内容
脱式计算
①9028-(4028+523)-477
②8
-[8-(2.125-0.125÷
)]
③3
÷[(4
-3
)×
+(3
-2
)×1
]
④(1-
)(1-
)(1-
)…(1-
)
①9028-(4028+523)-477
②8
| 7 |
| 8 |
| 1 |
| 8 |
③3
| 1 |
| 8 |
| 5 |
| 12 |
| 13 |
| 24 |
| 4 |
| 7 |
| 1 |
| 18 |
| 7 |
| 12 |
| 10 |
| 17 |
④(1-
| 1 |
| 2×2 |
| 1 |
| 3×3 |
| 1 |
| 4×4 |
| 1 |
| 2001×2001 |
(1)9028-(4028+523)-477
=(9028-4028)-(523+477),
=5000-1000,
=4000;
(2)8
-[8-(2.125-0.125÷
)]
=8
-[8-(2
-
÷
)],
=8
-[8-(2
-1)],
=8
-[8-1
],
=8
+1
-8,
=10-8
=2;
(3)3
÷[(4
-3
)×
+(3
-2
)×1
]
=
÷[(
-
)×
+(
-
)×
],
=
÷[
×
+
×
],
=
÷[
+
],
=
×
,
=
;
(4)(1-
)(1-
)(1-
)…(1-
)
=
×
×
×…×
×
,
=
×
,
=
.
=(9028-4028)-(523+477),
=5000-1000,
=4000;
(2)8
| 7 |
| 8 |
| 1 |
| 8 |
=8
| 7 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
=8
| 7 |
| 8 |
| 1 |
| 8 |
=8
| 7 |
| 8 |
| 1 |
| 8 |
=8
| 7 |
| 8 |
| 1 |
| 8 |
=10-8
=2;
(3)3
| 1 |
| 8 |
| 5 |
| 12 |
| 13 |
| 24 |
| 4 |
| 7 |
| 1 |
| 18 |
| 7 |
| 12 |
| 10 |
| 17 |
=
| 25 |
| 8 |
| 53 |
| 12 |
| 85 |
| 24 |
| 4 |
| 7 |
| 55 |
| 18 |
| 31 |
| 12 |
| 27 |
| 17 |
=
| 25 |
| 8 |
| 21 |
| 24 |
| 4 |
| 7 |
| 17 |
| 36 |
| 27 |
| 17 |
=
| 25 |
| 8 |
| 1 |
| 2 |
| 3 |
| 4 |
=
| 25 |
| 8 |
| 4 |
| 5 |
=
| 5 |
| 2 |
(4)(1-
| 1 |
| 2×2 |
| 1 |
| 3×3 |
| 1 |
| 4×4 |
| 1 |
| 2001×2001 |
=
| 1×3 |
| 2×2 |
| 2×4 |
| 3×3 |
| 3×5 |
| 4×4 |
| 1999×2001 |
| 2000×2000 |
| 2000×2002 |
| 2001×2001 |
=
| 1 |
| 2 |
| 2002 |
| 2001 |
=
| 1001 |
| 2001 |
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