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38×8+6×388×4的简便方法脱式计算咋写?

38×8+6×38-38×4 =38×(8+6-4) =38×10 =380

6.6x7.8x4 =6.5x4x7.8 =26x7.8 =202.8

①11.23-3.4+8.77-6.6=11.23+8.77-(3.4+6.6)=20-10=10;②5.4÷[0.68÷(1.2-1.03)]=5.4÷[0.68÷0.17]=5.4÷4=1.35;③(3.24×99+3.24)÷8.1 =[3.24×(99+1)]÷8.1=324÷8.1=40;④(18.4-3.75)÷12.5÷0.8=14.65÷12.5÷0.8=14.65÷(12.5×0.8)=14.65÷10...

35x8+35x6-4x35 =35x(8+6-4) =35x10 =350

15.5×4+6.8 =62+6.8 =68.8

2012年1月28日星期六一、口算题小数加法:0.3+1.5=2.5+9.8=7.6+1.3=4.4+5.7=2.3+7.7=5.7+3.1=7.69+2.31=9.16+2.64=5.68+12.22=16.8+16.5=小数减法:6.8-3.8=4.26-3.71=0.88-2.12=5.34-69.21=68.4-61.5=9.58-3.7=18.94-5.66=15.69-9.78=115-68.59...

①12× 3 8 ÷ 3 4 =12× 3 8 × 4 3 =6;② 4 9 + 5 9 ×9= 4 9 +5=5 4 9 ;③14÷( 1 3 + 5 6 )× 3 4 =14÷ 7 6 × 3 4 =14× 6 7 × 3 4 =9;④3.6-2.8+16.4-7.2=(3.6+16.4)-(2.8+7.2)=20-10=10;⑤77× 4 5 +23×0.8=(77+23)×0.8=100×0.8=80.

13×8×5×6的积除以4×5乘六的积等 =13*(8÷4)*(5÷5)*(6÷6) =13*2*1*1 =26

32×125×25 =4×8×125×25 =(4×25)×(8×125) =100×1000 =100000 9048÷26 =(2600+2600+2600+1248)÷26 =2600÷26+2600÷26+2600÷26+1248÷26 =100+100+100+48 =348 2881÷ 43 =(1290+1591)÷ 43 =1290÷43+1591÷43 =30+37 =67 3.2×42.3×3.75-12.5×0....

34×3.535-3.5×34.34 =34×3.5×1.01-3.5×34×1.01 =0 8+89+899+8999+89999 =9+90+900+9000+90000-5 =99999-5 =99994 0.67×2.1+0.018×21+8.5×0.79 =0.67×2.1+0.18×2.1+8.5×0.79 =(0.67+0.18)×2.1+8.5×0.79 =0.85×2.1+0.85×7.9 =0.85×(2.1+7.9) =...

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