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3.25*0.8+0.325=检变方法

3.25*0.8+0.325=3.25x(1-0.2)+0.325=3.25-3.25x0.2+0.325=3.25-0.65+0.325=2.6+0.325=2.925

这个式子可以写成这样3.25*7.8+3.25*0.21+3.25*0.1 提取公因式3.25得3.25*(7.8+0.21+0.1)=26.3575

2.22*3.8-0.4*4.44等于35.67984

3.25*0.8+0.1*3.25+32.5=3.25*0.8+0.1*3.25+0.1*3.25=3.25*(0.8+0.1+0.1)=3.25*1=3.25

3.25乘1.1-0.325简便方法3.25乘1.1-0.325=3.25*1.1-3.25*0.1=3.25*(1.1-0.1)=3.25

原式=3.25*4.5+3.25*5.4+3.25*0.1=3.25*(4.5+5.4+0.1)=3.25*10=32.5

解:3.25x2.8x135-125x28x0.325 = 3.25x2.8x135-125x2.8x3.25 =3.25x2.8x(135-125) =3.25x2.8x10 = 3.25x28 =91.

3.25+1.75*0.8=3.25+0.35*5*0.8=3.25+0.35*4=3.25+1.4=4.65

解:3.09*0.8+0.2等于( 334/125 ),【即等于2.672】 ∵已知需求出3.09*0.8+0.2等于多少 A * B + A = A * (B + 1) ∴3.09 * 0.8 + 0.2 = 3.09 * 0.2 * 4 + 0.2 = 0.2 * (3.09 * 4 + 1) = 2/10 * [(3*100+9)/100 * 4 + 1] = 1/5 * (309/100 * 4 + 25/25) = 1/5 * (309/25 + 25/25) = 1/5 * 334/25 = 334/125 = 2.672 答:3.09*0.8+0.2等于334/125,【即等于2.672】

0.325*0.8+0.55/5/4-3/5/8/7=0.325*0.8+0.55*0.8-3/5*7/8=(0.325+0.55)*0.8-3/5*7/8=7/8*0.8-0.6*7/8=7/8*(0.8-0.6)=7/8*1/5=7/40

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