题目内容
| 脱式计算(能简算的要简算) 2-
|
4×58+84×1.2 | ||||||||||||||||
|
|
①2-
-
÷
,
=2-
-
,
=2-(
+
),
=2-1,
=1;
②4×58+84×1.2,
=232+100.8,
=332.8;
③
×
+
×
,
=
×
+
×
,
=
×(
+
)
=
×
,
=
;
④
+(
+
)÷
,
=
+1÷
,
=
+3,
=3
.
| 3 |
| 10 |
| 5 |
| 8 |
| 25 |
| 28 |
=2-
| 3 |
| 10 |
| 7 |
| 10 |
=2-(
| 3 |
| 10 |
| 7 |
| 10 |
=2-1,
=1;
②4×58+84×1.2,
=232+100.8,
=332.8;
③
| 2 |
| 23 |
| 8 |
| 17 |
| 9 |
| 23 |
| 2 |
| 17 |
=
| 8 |
| 23 |
| 2 |
| 17 |
| 9 |
| 23 |
| 2 |
| 17 |
=
| 2 |
| 17 |
| 8 |
| 23 |
| 9 |
| 23 |
=
| 2 |
| 17 |
| 17 |
| 23 |
=
| 2 |
| 23 |
④
| 2 |
| 3 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 2 |
| 3 |
| 1 |
| 3 |
=
| 2 |
| 3 |
=3
| 2 |
| 3 |
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