想一想、涂一涂
计算,能简算的要简算.①6.21﹣3.8+2.2 ②6.03+3.7+2.97③17.43﹣6.57﹣2.43 ④20.47﹣(1.47+6.8)⑤13.26+4.71+3.47+5.29 ⑥22.74+8.68﹣13.74.
计算下面各题,怎样算简便就怎样算.2.38×6.8+7.62×6.8 12.5×4﹣3.12÷1.226.8﹣(4.2+2.6)×1.5 15.84÷[0.8×(7.93﹣2.43)].
脱式计算,能简算的要简算.0.7×101﹣0.7 0.125×4.7×8 12.5﹣1.68﹣2.32 567÷20÷5.
脱式计算(分能简算的要简算.)70.8﹣1.25﹣1.75 5.81+8.3+4.19+11.7 8.7×9.90.25×17.3×0.4 0.15×9+0.15 3.54×0.29﹣0.29×2.54.
6.33×101﹣6.33 17.68÷5.2+2.7×1.5 35.6﹣5×1.73(1.1﹣0.78)×(2.7﹣1.95) 21÷0.25÷0.4 3.5×0.7+5.5×0.7+0.7.