八道简便运算题及答案
1. 158+262+138 =158+(262+138) =158+400 =558 2. 375+219+381+225 =(375+225)+(219+381) =600+600 =1200 3. 5001-247-1021-232 =5001-(247+1021+232) =5001-1500 =3501 4. (181+2564)+2719 =(181+2719)+2564 =5464...
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1. 158+262+138 =158+(262+138) =158+400 =558 2. 375+219+381+225 =(375+225)+(219+381) =600+600 =1200 3. 5001-247-1021-232 =5001-(247+1021+232) =5001-1500 =3501 4. (181+2564)+2719 =(181+2719)+2564 =5464...
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