| 简便计算: 46×26+26×64 99×56 25×44 83×101-83. |
| ①46×26+26×64 =26×(46+64) =26×(100+10) =2600+260 =2860 ②99×56 =(100-1)×56 =5600-56 =5544 ③25×44 =25×(40+4) =1000+100 =1100 ④83×101-83 =83×(101-1) =83×100 =8300 |
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a.12×(4+25)[ ]
a. 47+(14×5)(1)35+65=
65+35=
35+65○65+35