计算下面各题.= = == = == = =
怎样简便就怎样算.①8470﹣104×65 ②÷7+× ③÷5+÷2 ④.
计算.(能简便的就用简便方法计算)①25×10.4﹣1068÷89 ②57.5﹣14.25﹣15 ③34.5×9.23+0.77×34.5④64×1.25×2.5×5 ⑤(+)÷(2﹣1) ⑥(+)÷+.
下面各题,能简便计算的要用简便方法计算.①(8.5﹣3)×(0.34÷1.7) ②2.5×(1.9+1.9+1.9+1.9)③ ④.
脱式计算,能简算的要简算.①1375+450÷15×25 ②1﹣(+) ③43×99+43④(68﹣×)÷17 ⑤0.4×8×12.5× ⑥4﹣÷(+ )
下面各题,怎样算简便就怎样算.①1080+270÷18﹣864 ②7.54++2.46+ ③(2.4﹣)÷0.625+④2.5×12.5×40×0.8 ⑤98.9×99+98.9 ⑥40.5÷×[(1﹣)×1.2].