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
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![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](/uploads/image/z/755978-50-8.jpg?t=1.%E7%94%A8%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95%E8%AE%A1%E7%AE%97%E4%B8%8B%E9%A2%98%EF%BC%9A%EF%BC%881%EF%BC%89981%2B5%C3%979810%2B49%C3%9798+%EF%BC%882%EF%BC%89301%C3%97467+%3D+%3D+%3D+%3D%EF%BC%883%EF%BC%89%EF%BC%8810000%E2%80%941000%E2%80%94100%E2%80%9410%EF%BC%89%C3%B710+%EF%BC%884%EF%BC%8928%2B28%2B28+%EF%BC%885%EF%BC%8996%2B15+%EF%BC%886%EF%BC%8945-18%2B19+%3D+%3D+%3D+%3D%EF%BC%881%EF%BC%89981%2B5%C3%979810%2B49%C3%97981)
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