This software is self study tool for elementary Arithmetic.it has no advertisement. You can choice below 4 difficulty type question. 1. Basic addition (answer is within 10) 2. Basic subtraction (answer is always plus and 1 digit calc) 3. Addition(increase in digit) (question with 1 digit, but answer is 2 digit) 4. Subtraction(decrease in digit) (question with 2 digit, and answer is 1 digit) At first, only type 1. if you want to add another difficulty type, open menu and choice you want. If answer is incorrect, you can see hint. One time, only show square for count, and answer is incorrect again, next hint appear. When calc type is 1, show square in line. when 2, show square of base number and show cross of subtract number. when 3, show square in line and show support square and line for inclese digit. when 4, like as when 2, but cross start from 10. it's like buy something with 10num coin and change. 这个软件是自主学习工具,基本Arithmetic.it没有广告。 你可以选择以下4种难度类型的问题。 1,基本除了(答案在10) 2,基本减法(答案永远是加号和1位计算) 3,增加(增加数字)(问题1的数字,但答案是2位) 4,减法(减少位数)(问题有2个数字,答案是1位) 起初,只有键入1,如果您想添加你想要另一个困难类型,打开菜单和选择。 如果答案不正确,就可以看到提示。有一次,只能说明方的数量,而答案不正确一遍,旁边的提示出现。 当计算式为1,行秀广场。当2,基地数量和减法数显十字秀广场。当3,显示在方线,显示支持方和线inclese数字。 4时,因为当2样,但是从10开始交这就像买东西用10num硬币和变化。 更多