1.用简便算法计算下题:(1)981+5×9810+49×98 (2)301×467 = = = =

问题描述:

1.用简便算法计算下题:(1)981+5×9810+49×98 (2)301×467 = = = =
(3)(10000—1000—100—10)÷10 (4)28+28+28 (5)96+15 (6)45-18+19
= = = =
(1)981+5×9810+49×981

(1)981+5×9810+49×981=981+50×981+49×981=(1+50+49)×981=100×981=98100(2)301×467 =(300+1)×467=300×467+467=140567(3)(10000—1000—100—10)÷10 =1000-100-10-1= 889(4)28+28+28=(30-2)×3=9...