题目内容
脱式计算(能简算的要简算).
(1)
×18+12÷
(2)
-
÷
-
(3)99.5×27.5+0.5×27.5
(4)
×[(
-
)÷
].
(1)
| 5 |
| 6 |
| 1 |
| 6 |
(2)
| 7 |
| 5 |
| 2 |
| 5 |
| 7 |
| 15 |
| 1 |
| 7 |
(3)99.5×27.5+0.5×27.5
(4)
| 4 |
| 15 |
| 3 |
| 4 |
| 7 |
| 12 |
| 4 |
| 9 |
(1)
×18+12÷
,
=15+12×6,
=15+72,
=87;
(2)
-
÷
-
,
=
-
×
-
,
=
-
-
,
=
-(
+
),
=
-1,
=
;
(3)99.5×27.5+0.5×27.5,
=(99.5+0.5)×27.5,
=100×27.5,
=2750;
(4)
×[(
-
)÷
],
=
×[
×
],
=
×
,
=
.
| 5 |
| 6 |
| 1 |
| 6 |
=15+12×6,
=15+72,
=87;
(2)
| 7 |
| 5 |
| 2 |
| 5 |
| 7 |
| 15 |
| 1 |
| 7 |
=
| 7 |
| 5 |
| 2 |
| 5 |
| 15 |
| 7 |
| 1 |
| 7 |
=
| 7 |
| 5 |
| 6 |
| 7 |
| 1 |
| 7 |
=
| 7 |
| 5 |
| 6 |
| 7 |
| 1 |
| 7 |
=
| 7 |
| 5 |
=
| 2 |
| 5 |
(3)99.5×27.5+0.5×27.5,
=(99.5+0.5)×27.5,
=100×27.5,
=2750;
(4)
| 4 |
| 15 |
| 3 |
| 4 |
| 7 |
| 12 |
| 4 |
| 9 |
=
| 4 |
| 15 |
| 1 |
| 6 |
| 9 |
| 4 |
=
| 4 |
| 15 |
| 3 |
| 8 |
=
| 1 |
| 10 |
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