题目内容
直接写出答案
(1)8+98+998
(2)2
-(
+1
)=
(3)12.5×5×0.16=
(4)
÷7=
(1)8+98+998
(2)2
| 3 |
| 2008 |
| 1 |
| 5 |
| 3 |
| 2008 |
(3)12.5×5×0.16=
(4)
| 7 |
| 8 |
(1)8+98+998,
=2+2+4+98+998,
=(2+98)+(2+998)+4,
=100+1000+4,
=1104;
(2)2
-(
+1
),
=2
-
-1
,
=2
-1
-
,
=1-
,
=
;
(3)12.5×5×0.16,
=12.5×5×(0.4×0.4),
=12.5×5×0.4×0.4,
=(12.5×0.4)×(5×0.4),
=5×2,
=10;
(4)
÷7,
=
×
,
=
.
=2+2+4+98+998,
=(2+98)+(2+998)+4,
=100+1000+4,
=1104;
(2)2
| 3 |
| 2008 |
| 1 |
| 5 |
| 3 |
| 2008 |
=2
| 3 |
| 2008 |
| 1 |
| 5 |
| 3 |
| 2008 |
=2
| 3 |
| 2008 |
| 3 |
| 2008 |
| 1 |
| 5 |
=1-
| 1 |
| 5 |
=
| 4 |
| 5 |
(3)12.5×5×0.16,
=12.5×5×(0.4×0.4),
=12.5×5×0.4×0.4,
=(12.5×0.4)×(5×0.4),
=5×2,
=10;
(4)
| 7 |
| 8 |
=
| 7 |
| 8 |
| 1 |
| 7 |
=
| 1 |
| 8 |
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