某家用电器商店有彩电、冰箱、洗衣机共216台,其中彩电56台,冰箱与洗衣机的台数比是7:9,冰箱和洗衣机各多少台?
0.75×0.66=11.05×0.04=0.43×2.25=4.82×11.23=
竖式计算.0.86×7= 19.5×1.8= 3.25×50=2.8×0.94= 0.375×1.4= 0.67×8.6=
口算.2.5×0.6×0.4= 1.25×0.7×0.8=0.1×0.2×0.3= 5.4﹣0.4×5=0.26×0.2×50= 0.5×0.75×4=12.5×0.1×0.8= 0.4×0.1×0.25=
一只草原牛的身高是蒙古牛的l.2倍,体重是蒙古牛的1.4倍.(1)草原牛的身高是多少?(2)一只草原牛与一只蒙古牛共有多重?