1-[1-(57+314÷34)]×27 932÷[34-(516+14)] [5.7-4.8×]÷0.45 987×655-321666+987×654+412÷14 12004+22004+320
编辑:chaxungu时间:2026-04-27 13:18:27分类:小学数学题库
| 1-[1-(+÷)]× | ÷[-(+)] |
| [5.7-4.8×(480%-3.8)]÷0.45 | +4÷ |
| +++…+ | (1++3+9)÷(1+3+9). |
(1)1-[1-(
+
÷
)]×
,
=1-[1-(
+
)]×
,
=1-[1-1]×
,
=1-0×
,
=1-0,
=1;
(2)
÷[
-(
+
)],
=
÷[
-
],
=
÷
,
=
;
(3)[5.7-4.8×(480%-3.8)]÷0.45,
=[5.7-4.8×1]÷0.45,
=[5.7-4.8]÷0.45,
=0.9÷0.45,
=2;
(4)
+4
÷
,
=
| 987×(654+1)-321 |
| 666+987×654 |
+4
÷
,
=
| 987×654+987-321 |
| 666+987×654 |
+4
÷
,
=
+4
÷
,
=1+4
÷
,
=1+18,
=19;
(5)
+
+
+…+
,
=
,
=
,
=
,
=
;
(6)(1+
+3
+9
)÷(1
+3
+9
),
=[(1+3+9)+(
+
+
)]÷[(1+3+9)+(
+
+
),
=[13+
]÷[13+
],
=[13×(1+
)]÷[13×(1+
)],
=(1+
)÷(1+
),
=
÷
,
=
.