题目内容
用简便方法计算。
|
| (1)原式=965-165+285 =800+285 =1085 |
(2)原式=370-(195+105) =370-300 =70 |
| (3)原式=(243+57)+(91+109) =300+200 =500 |
(4)原式=325-(114+86) =325-200 =125 |
| (5)原式=808+182+(449+551) =1000+1000 =2000 |
(6)原式=924-324+78 =600+78 =678 |
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