苏教版三年级上册数学乘法估算练习400题及答案

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苏教版三年级上册数学乘法估算练习400题答案48002800350016001005603200180400012003204200240025036001600270010003200200270054016003500350045005400600240048002400100180012003500320630024002705001200240360045004204003501500560016003200320120021003500490040020009004500420035001000160100120020001600420016006002800630027002400540030001800360090040040081020005600200060012002100320036024002400210035001800400560012010004200250015003003200320100054003500280050070048054004800160056003600420240056001800800560270056048002100320045009002500240018048004200150018009006306400120015006004500160035004209006001400140720010003203600480015004501800150024002800180300016048006003200120056009001200900800180024001400280016006402505601000480