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980 50的简便计算

980÷50的地等式简便计算980÷50=19.6 直接计算 没有简算

980+50x98+4x980=98x10+50x98+40x98=98x(10+50+40)=98x100=9800

980(492)的简便运算过程如下:980x492=(1000-20)x492=1000x492-20x492=492000-9840=482160

(1)2.5*32*0.125 =(2.5*4)*(8*0.125) =10*1 =10 (2)3.5-7+6.5 =3.5+6.5-7 =3 (3)1.2*2.5+0.8*2.5 =2.5(1.2+0.8) =25 (4)8.9*1.25-0.9*1.25 =1.25(8.9-0.9) =10 (5)12.5*7.4*0.8 =12.5*0.8*7.4 =74 (6)6.5*9.5+6.5*0.5 =6.5*(9.5+0.5) =6.5*10 =65 (7)0.35*1.

980除以50的脱式计算=98÷5=19.6

1后面的数位用0添补就可以了.

980÷4=(900+80)÷4=900÷4+80÷4=225+20=245980÷4=(800+100+80)÷4=800÷4+100÷4+80÷4=200+25+20=245

980/35 23*40简便计算980/35+23*40=28+920=948.

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