计算.(能简算的要用简便方法计算)
(1)÷6+× (2)12×(1﹣÷)
(3)(×+)÷ (4)×[﹣(﹣)]
(5)10﹣(39÷+) (6)2﹣(+)×.
数学医院.
854﹣136﹣36
=854﹣(136﹣36)
=854﹣100
=754
改正:
289﹣35+65
=289﹣(35+65)
=289﹣100
=189.
改正:
能简算的用简便方法计算.
(﹣÷2)× ﹣(+)× ×99+
(1﹣75%)÷(1+) 204÷+204×9. 2.7÷(1﹣20%﹣18%)
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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