有三个数，甲、乙的平均数是19，甲、丙的平均数是16.5，乙、丙的平均数是17.5．这三个数各是多少？
直接写出得数．======== 1.2×0.5= 0.16÷0.8= 0.32= 53=
计算．﹣﹣=﹣﹣=+﹣=
直接写出得数． ①= ②= ③= ④= ⑤= ⑥= ⑦= ⑧0.52= ⑨= ⑩1+2÷3=
直接写出结果﹣= 270÷18= 2÷= 10×10%= 5﹣0.25+0.75= ：= 7×÷7×= 042﹣0.32= 341﹣103= 1÷×=
直接写得数 ①+= ②1﹣0.25= ③0.72÷0.6= ④125×8= ⑤25×17×4= ⑥13×10.2=
=
=
=
=
=
=
=
=
﹣
﹣
=
﹣
﹣
=
+
﹣
=
= ②
= ③
= ④
= ⑤
=
= ⑦
= ⑧0.52= ⑨
= ⑩1+2÷3=
﹣
= 270÷18= 2÷
= 10×10%= 5﹣0.25+0.75=
=
7×
×
=
+
= ②1﹣0.25= ③0.72÷0.6=
粤公网安备 44130202000953号