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1、,达标测试卷,4,67,33,乘法分配,2(25+15)=80,按从左往右的顺序计算,先算乘、除法,后算加、减法,小括号里面的,中括号里面的,达标测试卷,4,减,乘,除,64,39,61,40,86,a,40,91,431,达标测试卷,4,162+142,(16+14)2,72,达标测试卷,4,达标测试卷,4,A,C,A,达标测试卷,4,D,C,达标测试卷,4,880,900,110,720,1200,6400,472,3000,1460,640,1600,5900,达标测试卷,4,=(324+176)+(79+121) =500+200 =700,=98(25+40) =98+10000 =
2、98000,=(23+77)27 =10027 =2700,达标测试卷,4,=1200-(765+235) =1200-1000 =200,=84020 =42,=54(199+1) =54200 =10800,达标测试卷,4,=140(32-25) =1407 =20,=25(48)125 =(254)(8125) =1001000 =100000,达标测试卷,4,1051,9414,达标测试卷,4,2800,14000,42000,432,1296,8640,达标测试卷,4,125508 =(1258)50 =100050 =50000(千克) =50(吨),达标测试卷,4,方法一: 5620+4420 =1120+880 =2000(元),方法二: (56+44)20 =100+20 =2000(元),达标测试卷,4,(20+13)2=66(米),201315 =201513 =3900(棵),达标测试卷,4,(180+220)90 =40090 =36000(米),方法一:22090-18090 =19800-16200 =3600(米),方法二:(220-180)90 =4090 =3600(米),达标测试卷,4,方法一:(180+90)16 =27016 =4320(元) 方法二:18016+9016 =2880+1440 =4320(元),