题目内容
脱式计算
①4
| ②(9.1×7.5×4.6)÷(1.3×2.5×2.3) | ||||||||||||||||||||||||
③
| ④
|
①4
-9
+(8
-2
),
=(4
+8
)-(9
+2
),
=13-12,
=1;
②(9.1×7.5×4.6)÷(1.3×2.5×2.3),
=
,
=7×3×2,
=42;
③
×
+
×
+
×3
,
=
×
+
×
+
×
,
=
×(
+
+
),
=
×
,
=
;
④
+
+
+
+
+
,
=
+
-
+
-
+
-
+
-
+
-
,
=
+
-
,
=1-
,
=
.
| 3 |
| 4 |
| 7 |
| 11 |
| 1 |
| 4 |
| 4 |
| 11 |
=(4
| 3 |
| 4 |
| 1 |
| 4 |
| 7 |
| 11 |
| 4 |
| 11 |
=13-12,
=1;
②(9.1×7.5×4.6)÷(1.3×2.5×2.3),
=
| 9.1×7.5×4.6 |
| 1.3×2.5×2.3 |
=7×3×2,
=42;
③
| 7 |
| 15 |
| 3 |
| 8 |
| 1 |
| 15 |
| 7 |
| 16 |
| 1 |
| 15 |
| 1 |
| 2 |
=
| 7 |
| 15 |
| 3 |
| 8 |
| 7 |
| 15 |
| 1 |
| 16 |
| 7 |
| 15 |
| 1 |
| 2 |
=
| 7 |
| 15 |
| 3 |
| 8 |
| 1 |
| 16 |
| 1 |
| 2 |
=
| 7 |
| 15 |
| 15 |
| 16 |
=
| 7 |
| 16 |
④
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 30 |
| 1 |
| 42 |
=
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 7 |
=
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 7 |
=1-
| 1 |
| 7 |
=
| 6 |
| 7 |
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