计算下面各题,怎样简便就怎样计算.884÷34+17×21 1.25×3.2×0.25 ()÷+4÷5+39× 4.2﹣1.38+5.8﹣4.62 2÷﹣÷2.
怎样算简便就怎样算:÷[(﹣)×]; 15.28﹣3.99﹣9.01; ×﹣÷4.
用简便方法计算.(1)72×40%+27×+0.4 (2)25×3×0.4×.
直接写得数5.8﹣5.8×0= 4﹣﹣= 0.25×4×2= 4.5+5.5= 0.5×2﹣0.5=(4+5)×30= 8.01+99×8.01= (×)÷(×)= 6+25×2= 100﹣25×4=
直接写出得数.5.8﹣5.8×0= 4﹣﹣= 0.83×50×2= 4÷﹣÷4=0.5﹣0.5×0.5= (+)×30= 8.01+99×8.01= ×÷×=
怎样算简便就怎样算(4800÷12+1)×12 2.4+2.4×3.75+2.4×0.25 ×1.8+×4.2 (+×)÷ 24×+62× (0.4+0.5)÷(1.75﹣0.75)×0.5 209+491+258+42 101×0.33 99×23.