Rounding Quiz (Combined) 小數位及有效數字:同步測驗
輸入正確答案後(不可包含空格)按「核對」。答對得1分,答錯不扣分。
Press “Check” after entering answers (spaces are not allowed). One mark is scored for each correct answer. No marks are deducted for wrong answers.
gMath 互動數學教室
http://www.gmath.hk