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

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/09 12:23:52
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.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.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.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=90-6=84
(5)96+15 =96+4+11=100+11=111
(6)45-18+19=45+1=46

(3)10000/10+1000/10+100/10+10/10=1111 (4)28*3=84
(90+10)+(6+5)=111 (6) 45+(19-18)=46