一个房间长8米,宽4米,用边长4分米的正方形地砖铺地需要这样的地砖多少块?如果每块地砖15元,铺好这个房间一共要用多少钱?
350×0.02= 1﹣25%= 1+15%= 12﹣7.9=×= ﹣= (﹣)×24= 16×=131131÷131= ××0= 1÷﹣÷1= 12.5×0.08=0.9+99×0.9= 7.8×0.25×4= ﹣+= 0.52×100=×8+8×= ×21×= 98﹣0.23﹣0.77= +÷=44÷= 9300÷5÷6= 0÷= 1997+1998+1999+6=
直接写出得数.4+4.73= ÷9= ×÷×= 4 ﹣4 = 375÷1 = ×2÷×2= 36+0.4= 5×32×2.5= 1÷0.9= 8×(12+0.5)= = = = = = = = = = = = = = = 35+0.4= 8×(12+0.5)= 4×0.8×2.5×12.5= = = = .
直接写出得数.1﹣0.09= 0.45×101= 2÷0.02= 0.25×0.7×0.4=×= 5﹣= ÷= 2.72+3﹣2.72+3=
直接写出得数.1.9+3.01= 0.23×400= ÷= 5×÷×5=(+)×15= ××= ﹣= 10﹣﹣0.875=
水结成冰后,体积增加了,当冰融化水后,体积减少几分之几?