直接写得数. 50×30= 480÷8= 200×4= 1.7+6.2= 400÷5=90×20= 800÷4= 22×40= 6.7﹣2.4= 270÷9=14×4= 560﹣300= 0÷76= 0.2+0.8= 1﹣0.6=
用简便方法计算下面各题: 25+96+35+4; 4×13×25×5; 25×32×15; 918﹣233﹣167﹣518; 38×14+162×14; 7000÷25÷4.
用简便方法计算 (1)0.13×+×13% (2)18×25%+68×25%+14÷4.
用简便方法计算 8.16+5.49+2.84+4.51 1.29+3.7+2.71+6.3 12.98﹣(6.37+3.98) 36.9﹣10.47+3.1﹣10.53.
用简便方法计算下面各题. 18.5×30 34.5﹣8.9﹣9.9﹣10.9 (8﹣0.8)×125 3.5×1.02+35×0.098.
68×34+68×67﹣68.