朋友為了給孩子練習10以內加減法，讓我幫忙打印一些，我順便寫了個簡答的程序。代碼比較簡單，寫的不好，勿噴！不足之處望指出。再此謝過！！！

public static void main(String[] args) {TestTwo(); }public static void TestTwo() {Integer a = 0;Integer b = 0;for (int i = 0; i < 80; i++) {a = ToolClass.randomNum(10, 1);b = ToolClass.randomNum(10, 1);// 減法 a-()=bif (a > b) {System.out.print(a + " — ( ) = " + b + " ");} else {System.out.print(b + " — ( ) = " + a + " ");}// ()-a=bif (a + b <= 10) {System.out.print("( ) — " + b + " = " + a + " ");} else { // a > 5 b > 5 a>5 b<5 a<5 b>5if (a <= 5) {int c = ToolClass.randomNum(5, 1);System.out.print("( ) — " + a + " = " + c + " ");} else if (a > 5 && b > 5) {int c = ToolClass.randomNum(5, 1);System.out.print("( ) — " + (a - 5) + " = " + c + " ");} else {int c = ToolClass.randomNum(5, 1);System.out.print("( ) — " + b + " = " + c + " ");}}// 加法if (a < b) {System.out.println(a + " + ( ) = " + b + " ");} else {System.out.println(b + " + ( ) = " + a + " ");}} }

工具類：

/*** 隨機生成一個小于已知數字的隨機數* @param maxNum 最大的數* @param minNum 最小的數* @return*/ public static Integer randomNum(int maxNum,int minNum) {int max=maxNum;int min=minNum;Random random = new Random();return random.nextInt(max)%(max-min+1) + min; }

結果如下：

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總結

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