用竖式计算,带*的验算.42.6+13.48=*10﹣0.42=6.57﹣1.83=*62.37+8.09=
能简便的要简便20.4﹣0.8×0.4﹣0.68 (227÷25﹣4.68)×0.56.4×9.9+0.64 5.37×2.5+7.5×5.37.
下面各题能简便的要简便.15﹣8.13﹣1.87 5.14+3.225﹣6.302 3.95+5.36﹣1.9513.67﹣(5.45+3.67) 4.26+5.48﹣1.26+4.52 14.67+25.91+15.33+4.09.
递等式计算:(能简算的用简便方法计算)(1)(5.81﹣2.09)×3.5(2)2.5×8×0.5+40(3)3.865+1.92+3.135+2.08(4)5.8×6.1+3.2×6.1+6.1(5)16÷0.25÷0.4(6)(750﹣366)÷48×[25÷(210﹣209)].
用你喜欢的方法计算.19.2÷2.4×3.2 12.5×0.32×0.514.3÷1.1﹣1.8 3.2×2.4+32×0.76.
(1)9.36+3.65+0.64(2)1.3×(8.1﹣5.6)(3)7.2×9.8+0.2×7.2(4)6.3×1.5﹣2.92.