计算下面各题,怎样简便就怎样算.
284+28+116
180+74+27+126+120+73
2×l25×8×5
125×897×835×101
33×46+46×17
973×5×2
68×99.
计算下面各题,怎样简便就怎样计算.
234×12+166×12
(40+4)×25
1008÷(71﹣62)÷8
357+123﹣257+277.
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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