□+18=18 67-□=28 □-37=63
怎样简便就怎样算.①5.5×17.3+2.7×5.5 ②1.25×(6.2﹣5.9)×80 ③1.5×99④70.3﹣17.48÷7.6 ⑤3.64÷52×23.3 ⑥4.6×(1﹣0.25)+0.75×5.4.
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①0.24+1.33﹣0.63 ②2.58﹣(3.5﹣2.4) ③19.92﹣14.4﹣0.92④54÷(3.94+6.86) ⑤3.6÷0.4﹣1.2×5 ⑥3.4×7.8÷3.9.
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+472×58125×96×8 9.5+4.85﹣8.16 51.27﹣8.66﹣1.34.
计算下面各题,能简算的要简算.0.125×32×2.5= 0.8×6.3﹣0.8×3.8=504÷3.2×2.08= (20﹣0.8×9)×5.7=