题目内容
8000-2520÷24×72
÷(
+
)×12
[3-(
+0.75)÷
]×
0.75×
+
×
-12×75%
1
-
+
-
+
-
.
| 21 |
| 8 |
| 1 |
| 3 |
| 1 |
| 4 |
[3-(
| 5 |
| 4 |
| 11 |
| 8 |
| 36 |
| 7 |
0.75×
| 127 |
| 9 |
| 3 |
| 4 |
| 17 |
| 9 |
1
| 1 |
| 3 |
| 7 |
| 12 |
| 9 |
| 20 |
| 11 |
| 30 |
| 13 |
| 42 |
| 15 |
| 56 |
(1)8000-2520÷24×72,
=8000-105×72,
=8000-7560,
=440;
(2)
÷(
+
)×12,
=
÷
÷12,
=
×
×12,
=54;
(3)[3-(
+0.75)÷
]×
,
=[3-2×
]×
,
=
×
,
=
,
=7
;
(4)0.75×
+
×
-12×75%,
=0.75×(
+
-12),
=0.75×(16-12),
=0.75×4,
=3;
(5)1
-
+
-
+
-
,
=(
+
+
)-(
+
+
),
=(
+
+
)-(
+
+
),
=
-
,
=
-
,
=
,
=
.
=8000-105×72,
=8000-7560,
=440;
(2)
| 21 |
| 8 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 21 |
| 8 |
| 7 |
| 12 |
=
| 21 |
| 8 |
| 12 |
| 7 |
=54;
(3)[3-(
| 5 |
| 4 |
| 11 |
| 8 |
| 36 |
| 7 |
=[3-2×
| 8 |
| 11 |
| 36 |
| 7 |
=
| 17 |
| 11 |
| 36 |
| 7 |
=
| 612 |
| 77 |
=7
| 73 |
| 77 |
(4)0.75×
| 127 |
| 9 |
| 3 |
| 4 |
| 17 |
| 9 |
=0.75×(
| 127 |
| 9 |
| 17 |
| 9 |
=0.75×(16-12),
=0.75×4,
=3;
(5)1
| 1 |
| 3 |
| 7 |
| 12 |
| 9 |
| 20 |
| 11 |
| 30 |
| 13 |
| 42 |
| 15 |
| 56 |
=(
| 4 |
| 3 |
| 9 |
| 20 |
| 13 |
| 42 |
| 7 |
| 12 |
| 11 |
| 30 |
| 15 |
| 56 |
=(
| 560 |
| 420 |
| 189 |
| 420 |
| 130 |
| 420 |
| 490 |
| 840 |
| 308 |
| 840 |
| 225 |
| 840 |
=
| 879 |
| 420 |
| 1023 |
| 840 |
=
| 1758 |
| 840 |
| 1023 |
| 840 |
=
| 735 |
| 840 |
=
| 7 |
| 8 |
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