直接写得数.0.25×8= 5.6×99= 18.45÷9=6+2.6= 7.4﹣0.4= 2.5×4÷100=0.63×100= 3.6×2.5= 0.99+0.1÷10=40÷50= 0.62÷10= 0.8×2÷0.8×2=4.2÷0.7= 125×8.2= 1.5×0.7+8.5×0.7=3×0.32=
用简便方法计算.6.3×8.7+8.7×3.7 (﹣+)×12 ×+÷.
简算3.6﹣﹣×3 ﹣[﹣(﹣)].
用简便方法计算.①3.5%×9.9②4.62+9.9③4×0.6+0.6÷4.
简算950÷25 72×12.5× 18.5×72+1.85×280.
直接写数对又快5.7+11.8+4.3= 2﹣+= (+)×24= 0.32﹣0.22=33×98+66= 10.1×99﹣9.9= 4﹣(+0.5)= :=.