列竖式计算下面各题.430+260 530﹣380 420+390450﹣290 230+180 620﹣470.
7.28﹣(0.8+3.28) 3.15+1.83+6.85+2.17 5.3+0.98+2.7 2.72﹣3.98+5.28﹣2.02 10.78﹣1.54﹣2.46 8.44﹣(5.44+2.8)
1+0.25= 0.5×2.69×0.2= 7.3+0.6+0.03= 5.36+4.4= 7.5+2.5÷4= 2.78﹣5.46+5.22=
用竖式计算.(画★要验算) 16﹣3.78 18.96+5.09 9.65+47.8 7.564﹣3.48★8.57+24.3 23.6﹣3.83.
竖式计算 37.8+3.02= 8.5﹣6.69= 20﹣15.07=
直接写得数. 1.2+0.8= 4﹣1.5= 5.6﹣0.8= 15×4= 2.7﹣0.7= 2.3﹣1.8= 9+3.3= 18×3= 0.9+0.3= 7+2.7= 10﹣6.2=12×7= 120×30= 600×50=