题目内容
能简算的要简算．
①23×
+57÷
②1.36×2.7+13.6×0.73
③0.25×1.25÷
④（
+
-
）×24
⑤[1-
÷（
+
×
）]÷
⑥2008×
．
①23×
| 3 |
| 8 |
| 8 |
| 3 |
②1.36×2.7+13.6×0.73
③0.25×1.25÷
| 1 |
| 32 |
④（
| 3 |
| 8 |
| 7 |
| 8 |
| 2 |
| 3 |
⑤[1-
| 7 |
| 8 |
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
| 7 |
| 12 |
⑥2008×
| 1 |
| 2007 |
①23×
+57÷
，
=（23+57）×
，
=80×
，
=30；
②1.36×2.7+13.6×0.73，
=1.36×2.7+1.36×7.3
=1.36×（2.7+7.3），
=1.36×10，
=13.6；
③0.25×1.25÷
，
=0.25×1.25×32，
=（0.25×4）×（1.25×8），
=1×10，
=10；
④（
+
-
）×24，
=
×24+
×24-
×24，
=9+21-16，
=14；
⑤[1-
÷（
+
×
）]÷
，
=[1-
÷1]÷
，
=
÷
，
=
；
⑥2008×
，
=（2007+1）×
，
=2007×
+
，
=1+
，
=1
．
| 3 |
| 8 |
| 8 |
| 3 |
=（23+57）×
| 3 |
| 8 |
=80×
| 3 |
| 8 |
=30；
②1.36×2.7+13.6×0.73，
=1.36×2.7+1.36×7.3
=1.36×（2.7+7.3），
=1.36×10，
=13.6；
③0.25×1.25÷
| 1 |
| 32 |
=0.25×1.25×32，
=（0.25×4）×（1.25×8），
=1×10，
=10；
④（
| 3 |
| 8 |
| 7 |
| 8 |
| 2 |
| 3 |
=
| 3 |
| 8 |
| 7 |
| 8 |
| 2 |
| 3 |
=9+21-16，
=14；
⑤[1-
| 7 |
| 8 |
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
| 7 |
| 12 |
=[1-
| 7 |
| 8 |
| 7 |
| 12 |
=
| 1 |
| 8 |
| 7 |
| 12 |
=
| 3 |
| 14 |
⑥2008×
| 1 |
| 2007 |
=（2007+1）×
| 1 |
| 2007 |
=2007×
| 1 |
| 2007 |
| 1 |
| 2007 |
=1+
| 1 |
| 2007 |
=1
| 1 |
| 2007 |
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