39乘9加8乘39减39乘7简便运算
2个回答
展开全部
一。3.4-0.15x2.6 =3.14-0.39 =-2.75 二。(6.05-3.35)÷1.5x0.9 =2.7/1.5*0.9 =1.8*0.9 =1.62 三。(19.75-6.38)÷0.25 =13.37*4 =53.48 四。0.4x[1.4-(2.4-2.25)] =0.4*(1.4-2.4+2.25) =0.4*(-1+2.25) =0.4*1.25 =0.5
简便运算
一。3.4-0.15x2.6 =3.14-0.39 =-2.75 二。(6.05-3.35)÷1.5x0.9 =2.7/1.5*0.9 =1.8*0.9 =1.62 三。(19.75-6.38)÷0.25 =13.37*4 =53.48 四。0.4x[1.4-(2.4-2.25)] =0.4*(1.4-2.4+2.25) =0.4*(-1+2.25) =0.4*1.25 =0.5
简便运算
一。3.4-0.15x2.6 =3.14-0.39 =-2.75 二。(6.05-3.35)÷1.5x0.9 =2.7/1.5*0.9 =1.8*0.9 =1.62 三。(19.75-6.38)÷0.25 =13.37*4 =53.48 四。0.4x[1.4-(2.4-2.25)] =0.4*(1.4-2.4+2.25) =0.4*(-1+2.25) =0.4*1.25 =0.5
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