计算:3.68×15.7-31.4+15.7×0.32=______.
题型:填空题难度:简单来源:不详
计算:3.68×15.7-31.4+15.7×0.32=______. |
答案
3.68×15.7-31.4+15.7×0.32 =15.7×(3.68+0.32)-31.4 =15.7×4-31.4 =31.4×2-31.4 =31.4 故答案为31.4 |
举一反三
已知:x2+x-3=0,则x3+4x2+1=______. |
(1)计算:(-1)2+tan60°-(π+2010)0 (2)因式分m2-4m. |
下列各式由左边到右边的变形中,是因式分解的为( )A.a(x+y)=ax+ay | B.x2-4x+4=x(x-4)+4 | C.2x2-x=x(2x-1) | D.x2-16+3x=(x+4)(x-4)+3x |
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