题目内容
计算:(能简算的要简算)
①
÷(
-
)×(
-
)
②9
×4.25+4
×
③
-0.6×(2
-1.75)
④(6
-3
)÷(13+11
)
⑤2008×20072008-2006×20082007
⑥3÷
÷
÷4.
①
| 4 |
| 9 |
| 5 |
| 6 |
| 1 |
| 2 |
| 7 |
| 8 |
| 1 |
| 2 |
②9
| 5 |
| 6 |
| 1 |
| 4 |
| 1 |
| 6 |
③
| 3 |
| 4 |
| 5 |
| 12 |
④(6
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 5 |
⑤2008×20072008-2006×20082007
⑥3÷
| 1 |
| 3 |
| 3 |
| 4 |
①
÷(
-
)×(
-
)
=
÷
×
,
=
×
,
=
;
②9
×4.25+4
×
=9
×4.25+4.25×
,
=(9
+
)×4.25,
=10×4.25,
=42.5;
③
-0.6×(2
-1.75)
=
-0.6×(2
-1
),
=
-
×
,
=
-
,
=
;
④(6
-3
)÷(13+11
)
=2
÷24
,
=
;
⑤2008×20072008-2006×20082007
=2008×(2007×10000+2007+1)-2006×(2008×10000+2007),
=2008×2007×10000+2007×2008+2008-2006×2008×10000-2006×2007,
=2008×10000+2×2007+2008,
=20080000+4014+2008,
=20086022;
⑥3÷
÷
÷4
=3×3×
×
,
=3.
| 4 |
| 9 |
| 5 |
| 6 |
| 1 |
| 2 |
| 7 |
| 8 |
| 1 |
| 2 |
=
| 4 |
| 9 |
| 1 |
| 3 |
| 3 |
| 8 |
=
| 4 |
| 3 |
| 3 |
| 8 |
=
| 1 |
| 2 |
②9
| 5 |
| 6 |
| 1 |
| 4 |
| 1 |
| 6 |
=9
| 5 |
| 6 |
| 1 |
| 6 |
=(9
| 5 |
| 6 |
| 1 |
| 6 |
=10×4.25,
=42.5;
③
| 3 |
| 4 |
| 5 |
| 12 |
=
| 3 |
| 4 |
| 5 |
| 12 |
| 3 |
| 4 |
=
| 3 |
| 4 |
| 3 |
| 5 |
| 2 |
| 3 |
=
| 3 |
| 4 |
| 2 |
| 5 |
=
| 7 |
| 20 |
④(6
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 5 |
=2
| 3 |
| 4 |
| 1 |
| 5 |
=
| 5 |
| 44 |
⑤2008×20072008-2006×20082007
=2008×(2007×10000+2007+1)-2006×(2008×10000+2007),
=2008×2007×10000+2007×2008+2008-2006×2008×10000-2006×2007,
=2008×10000+2×2007+2008,
=20080000+4014+2008,
=20086022;
⑥3÷
| 1 |
| 3 |
| 3 |
| 4 |
=3×3×
| 4 |
| 3 |
| 1 |
| 4 |
=3.
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