【部编】小升初数学知识专项训练一 数与代数-3.数的运算(1) - 百度文库 ر

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2.314.80.5

17.73.94.54

3. 𰸡 1600435465 =1600-(435+465) =1600-900 =700

43813884 =438-138-84 =300-84 =216

562399101 =562-(399+101) =562-500 =62

48718713961

=487-187-(139+61) =300-200 =100

921334221 =921-221-334 =700-334 =366

688534112 =688+112-534 =800-534 =266

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