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1、六年级数学简便计算练习(上册) 1125997 998+1246 4+3.25+6.8 12(1+2) 4001258 25(378)()12 12 34(2) 1258.8 4.354.253.653.75 3.4993.417.158.471.53 1734 2 0.1250.2532 22.32.455.34.55(+)72 4.253(21) 187.711187.7 4357.1250.5 () 2.42+4.5843 6.62.5 4.6+5.4 2.8+7.2+ (+) +2.25+ + + + 0.75+0.375 5-+ 48.3- 4.25+6 0.6250.5+62.5%
2、 +(-1.8)(111+999) 56(-) 49.5-(50-)0.6 + 45(+0.6) 89737.5%+1040.375 (5.375) 3.5+1.25+3.8 72156-5672 2532125 70999+709 299101563999 7199 3755+2996 8439+1001 446+295 888+999 21002026.6+2.56 75.399+75.3 4.63.7+540.37 0.125+8.25+12.5% 8.37-3.25-(1.37+1.75) 1161 154.255 19.826.573.43 4.6+3+6+5.4 4+2.25+5+7 9.632.54 60.253 + + 18(+) 7+5 ()(24)(+) (+) 7+5 () ()1511 12103450075 (3217) (25) (2121) (99)9 () ()30 3 4 5841 () 235 - 13518 153 0.653 10 - - + 25 13.098.124.88 ()