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46x32+42+32x12的简便运算

46x32+42+32x12 =32x46+32x12+32×2-22 =32x(46+12+2)-22 =32x(58+2)-22 =32x60-22 =1920-20-2 =1900-2 =1898

32✘(56-8+12)=32✘60=1920

32x12x128 估计本题是: 32x12x125 =(8×125)×(4×12) =1000×48 =48000

你好,这是口算题1)125×0.8=2)0.125×8=3)0.56÷8=4)0.3×7=5)8.36+0.75=6)3.2×0.2=7)5.6÷0.4=8)1.2+43=9)0.45+0.55=10)5.2+1.7=11)0.45×0.2=12)9.2-0.8=13)0.6×0.5=14)3.45÷10=15)1.68+3.34=16)1.25×8=17)8.3-2.4=18)34.6-4.9=19)0.8×6=20)1.23×3=...

原式=32x2+32x12 =32x(2+12) =32x14 =(30+2)x14 =30x14+2x14 =420+28 =448

960

(608一32x13)÷12 =(608/4-32X13/4)/(12/4) =(152-8*13)/3 =(152-104)/3 =48/3 =16

原式 =32x87+32x25-32x12 =32x(87+25-12) =32x(112-12) =32x100 =3200

(32×24)÷(16×12) =32×24÷16÷12 =(32÷16)×(24÷12) =2×2 =4

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