计算下面各题,能用简便方法的要用简便方法计算.
(1)9.78×2.3+2.3×10.22 (2)1.5×11﹣7.83+3.5
(3)7.25÷(31﹣29.55)×1.3 (4)75.6÷[0.7×(8.5﹣7.6)].
脱式计算.(能简便的用简便方法)
2.18+3.7+0.82+6.3 (620+380)÷50×4 528×58+472×58
125×96×8 9.5+4.85﹣8.16 51.27﹣8.66﹣1.34.
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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