下面各题,怎样算简便就怎样算. 6.8+0.98+0.2 43.5+43.5×99 1.25×7.2 11÷[(0.4+0.04)×0.5].
8+22= 8+24= 8+26= 8+28= 8+30= 8+32= 偶数+偶数=()
8+2= 8+4= 8+6= 8+8= 8+10= 8+12= 偶数+偶数=()
20+11= 20+31= 20+15= 20+17= 20+19= 20+21= 偶数+奇数=()
6+1= 6+3= 6+5= 6+7= 6+9= 6+11= 偶数+奇数=()
8+1= 8+3= 8+5= 8+7= 8+9= 8+11= 偶数+奇数=()