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58+79+382518-25-3523+710+13+31059-512+4989-(15-
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▼优质解答
答案和解析
（1）58+79+38，=（58+38）+79，=1+79，=179；（2）2518-25-35，=2518-（25+35），=2518-1，=718；（3）23+710+13+310，=（23+13）+（710+310），=1+1，=2；（4）59-512+49，=（59+49）-512，=1-512，=712；（5）89-（15-19），=89-15+19，=（89+19）-15，=1-15，=45；（6）512+1115-615+712，=（512+712）+（1115-615），=1+13，=113．
（1）58+79+38，=（58+38）+79，=1+79，=179；（2）2518-25-35，=2518-（25+35），=2518-1，=718；（3）23+710+13+310，=（23+13）+（710+310），=1+1，=2；（4）59-512+49，=（59+49）-512，=1-512，=712；（5）89-（15-19），=89-15+19，=（89+19）-15，=1-15，=45；（6）512+1115-615+712，=（512+712）+（1115-615），=1+13，=113．
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