四年级下册数学简便算法练习题
of rural drinking water sources, protection of drinking water sources in rural areas by the end er sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities- 8 -
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
1250÷25÷5
第七种
1200-624-76 2100-728-772 273-73-27 847-527-273
第八种
278+463+22+37 732+580+268 1034+780320+102 425+14+186
第九种
214-（86+14） 787-（87-29） 365-（65+118） 455-（155+230）
第十种
576-285+85 825-657+57 690-177+77 755-287+87
第十一种
871-299 157-99 363-199 968-599
第十二种
178X101-178 83X102-83X2 17X23-23X7 35X127-35X16-11X35
简便计算练习题5
容易出错类型（共五种类型）
600-60÷15 20X4÷20X4 736-35X20 25X4÷25X4
98-18X5+25 56X8÷56X8
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protecti
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