题目内容
直接写出得数:
(1)[0.85-(
-0.15)]÷
(2)[(7
+2.4÷6
)+2
]×5
(3)
×(17×
-
)-(12
-3
-2
)
(1)[0.85-(
| 1 |
| 3 |
| 28 |
| 5 |
(2)[(7
| 2 |
| 7 |
| 1 |
| 5 |
| 2 |
| 3 |
(3)
| 1 |
| 2 |
| 8 |
| 15 |
| 3 |
| 4 |
| 7 |
| 12 |
| 3 |
| 5 |
| 1 |
| 3 |
(1)[0.85-(
-0.15)]÷
,
=[0.85+0.15-
]×
,
=
=
×
,
=
;
(2)[(7
+2.4÷6
)+2
]×5,
=[
+2.4×
+
]×5,
=[
+
+
]×5,
=[
+
+
]×5,
=
×5,
=
,
=51
;
(3)
×(17×
-
)-(12
-3
-2
),
=(
×17×
-
×
)-(12
-3
-2
),
=
-
-12
+3
+2
,
=4
+3
+2
-12
-
,
=10
-12
-
,
=10
-(12
+
),
=9
-12
,
=-3
.
| 1 |
| 3 |
| 28 |
| 5 |
=[0.85+0.15-
| 1 |
| 3 |
| 5 |
| 28 |
=
=
| 2 |
| 3 |
| 5 |
| 28 |
=
| 5 |
| 42 |
(2)[(7
| 2 |
| 7 |
| 1 |
| 5 |
| 2 |
| 3 |
=[
| 51 |
| 7 |
| 5 |
| 31 |
| 8 |
| 3 |
=[
| 51 |
| 7 |
| 12 |
| 31 |
| 8 |
| 3 |
=[
| 4743 |
| 651 |
| 252 |
| 651 |
| 1736 |
| 651 |
=
| 6731 |
| 651 |
=
| 33655 |
| 651 |
=51
| 454 |
| 651 |
(3)
| 1 |
| 2 |
| 8 |
| 15 |
| 3 |
| 4 |
| 7 |
| 12 |
| 3 |
| 5 |
| 1 |
| 3 |
=(
| 1 |
| 2 |
| 8 |
| 15 |
| 1 |
| 2 |
| 3 |
| 4 |
| 7 |
| 12 |
| 3 |
| 5 |
| 1 |
| 3 |
=
| 68 |
| 15 |
| 3 |
| 8 |
| 7 |
| 12 |
| 3 |
| 5 |
| 1 |
| 3 |
=4
| 8 |
| 15 |
| 9 |
| 15 |
| 5 |
| 15 |
| 7 |
| 12 |
| 3 |
| 8 |
=10
| 7 |
| 15 |
| 70 |
| 120 |
| 45 |
| 120 |
=10
| 56 |
| 120 |
| 70 |
| 120 |
| 45 |
| 120 |
=9
| 176 |
| 120 |
| 115 |
| 120 |
=-3
| 61 |
| 120 |
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