如果以50千克为基准,超过的千克数记为正,不足的千克数记为负,怎样求出这6筐蔬菜的总质量?
\u67096\u7b50\u852c\u83dc\uff0c\u6bcf\u7b50\u7684\u8d28\u91cf\u4ee550\u5343\u514b\u4e3a\u57fa\u51c6\uff0c\u8d85\u8fc7\u7684\u5343\u514b\u6570\u8bb0\u4e3a\u6b63\u6570\uff0c\u4e0d\u8db3\u7684\u5343\u514b\u6570\u8bb0\u4e3a\u8d1f\u6570.\u8bb0\u5f55\uff08\u5355\u4f4d\uff1a\u5343\u514b\uff0950\u00d7\u3010\uff08-2+2\uff09+\uff08-3.5+0.5\uff09+\uff08+3+4\uff09\u3011
=50\u00d7\uff080-3+7\uff09
=50\u00d74
=200
3+4+2+5-6-1-4-4=-1\u603b\u8ba1\u4e0d\u8db3\u4e00\u5343\u514b\uff0c\uff1b
8\u7b50\u852c\u83dc\u7684\u603b\u91cd\u91cf\u662f50\u00d78-1=399\uff08\u5343\u514b)
总质量为
(+2)+(-3.5)+(-0.5)+(+3)+(+4)
=5
绛旓細锛8脳50-2+1+2-3+6-1-3+4锛壝8 =50.5鍗冨厠 杩8琚嬪ぇ绫冲钩鍧囬噸50.5鍗冨厠
绛旓細50+0.5-0.6-0.2+1.1+0=50.8鍗冨厠
绛旓細锛1锛変笌鏍囧噯閲嶉噺姣旇緝锛10琚嬪ぇ绫虫昏瓒呰繃1+1+1.5-1+1.2+1.3-1.3-1.2+1.8+1.1=5.4鍗冨厠锛涳紙2锛10琚嬪ぇ绫崇殑鎬婚噸閲忔槸50脳10+5.4=505.4鍗冨厠锛
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