脱式计算.
2004×8.1+1.9×2004 ﹣(+×)× (1﹣)÷(+)
4.38×0.75+3.62×0.75 12×11﹣12.5 35÷[(﹣)×3].
怎样简便就怎样计算.
(+)×24×15 3.7×+5.3×0.75+.
9.9+99.9+999.9 6.8÷4﹣1.2×25%+4×0.25.
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.
32÷4+2.5÷2.8
(1.75×3+1.75)×2.5
0.1×0.1÷(0.2+0.1﹣0.2+0.1)
0.08×2.7+0.08×6.3+0.08
(4.6÷0.2+0.8)×1.02
[(1.2﹣0.78)÷0.12+0.65]×0.8.
试题篮
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