(1)2005﹣999= (2)0.25+=
(3)= (4)=
(5)= (6)=
(7)11×991+99= (8)=
(9)1+3+5+7+9+11+13+15+17+19= (10)…×=
用递等式计算:(能简算的要简算)
(1)21.36÷0.8﹣12.9 (2)15.4×103﹣1.54×30
(3)29.61÷9.4×1.4 (4)(16.2﹣0.54)÷1.8.
计算.
25×19×64×125=
2000﹣2001+2002﹣2003+2004﹣2005+2006﹣2007+2008﹣2009+2010﹣2011+2012=
①8(2x+2.6)=32
②1.25×3.2×2.5
③4.6×2.89+6.11×4.6+4.6
④1995×1995+1994×1994﹣1995×1994﹣1994×1993.
计算:
①3×(x+9)=27
②16×8﹣7x=23
③7.5﹣7.5×0.5﹣2.6×0.8
④13.7×6.5+5.9×13.7﹣12.4×3.7
⑤50×[(0.2+4.8﹣4.8+0.2)÷2]
⑥11.25+21.25+31.25+41.25+51.25+61.25+71.25+81.25.
试题篮
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