题目内容
脱式计算
(1)(6
-3
)÷(13+11
)
(2)
+
+
+
+
(3)2.25×
+2.75÷1
+60%
(4)(1+3+5+…+1001)-(2+4+6+…+1000)
(1)(6
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 5 |
(2)
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 30 |
| 1 |
| 42 |
| 1 |
| 56 |
(3)2.25×
| 3 |
| 5 |
| 2 |
| 3 |
(4)(1+3+5+…+1001)-(2+4+6+…+1000)
(1)(6
-3
)÷(13+11
),
=(6
-3
)÷24
,
=3
÷
,
=
×
,
=
;
(2)
+
+
+
+
,
=
-
+
-
+
-
+
-
+
-
+
-
,
=
-
,
=
;
(3)2.25×
+2.75÷1
+60%,
=2.25×
+2.75×
+1×
,
=(2.25+2.75+1)×
,
=6×
,
=3
;
(4)(1+3+5+…+1001)-(2+4+6+…+1000),
=1+(3-2)+(5-4)+…+(1001-1000),
=1+1+1+…+1,
=501.
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 5 |
=(6
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 5 |
=3
| 1 |
| 4 |
| 121 |
| 5 |
=
| 13 |
| 4 |
| 5 |
| 121 |
=
| 65 |
| 484 |
(2)
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 30 |
| 1 |
| 42 |
| 1 |
| 56 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 7 |
| 1 |
| 7 |
| 1 |
| 8 |
=
| 1 |
| 2 |
| 1 |
| 8 |
=
| 3 |
| 8 |
(3)2.25×
| 3 |
| 5 |
| 2 |
| 3 |
=2.25×
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
=(2.25+2.75+1)×
| 3 |
| 5 |
=6×
| 3 |
| 5 |
=3
| 3 |
| 5 |
(4)(1+3+5+…+1001)-(2+4+6+…+1000),
=1+(3-2)+(5-4)+…+(1001-1000),
=1+1+1+…+1,
=501.
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