怎样简便就怎样计算. 怎样简便就怎样计算. 355+260+140+245102×992×125 3
怎样简便就怎样计算.怎样简便就怎样计算.355+260+140+245102×992×125382×101-3824×60×50×8645-180-24535×8+35×...
怎样简便就怎样计算. 怎样简便就怎样计算. 355+260+140+245102×992×125 382×101-382 4×60×50×8645-180-24535×8+35×6-4×35. 355+260+140+245102×992×125 382×101-382 4×60×50×8645-180-24535×8+35×6-4×35.
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(1)355+260+140+245, =(355+245)+(260+140), =600+400, =1000; (2)102×99, =102×(100-1), =10200-102, =10200-100-2, =10100-2, =10098; (3)2×125, =2×(100+25), =200+50, =250; (4)382×101-382, =382×(101-1), =382×100, =38200; (5)4×60×50×8, =4×60×50×2×4, =240×100×4, =240×4×100, =960×100, =96000; (6)645-180-245, =(645-245)-180, =400-180, =220; (7)35×8+35×6-4×35, =35×(8+6-4), =35×10, =350. |
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