Correct: 100 less than 42,597 is 42,497, 1,000 less than 71,603 is 61,603, 10,000 more than 79,410 is 89,410, 100 more than 345 is 445, 1,000 less than 54,429. is 53,429, Incorrect: 10 more than 38,301 is 48,301, 1,000 more than 25,789 is 23,789, 10 less than 2,618 is 2,628, 10,000 less than 16,831. is 26,831, 1 more than 4,095. is 5,095,

Add or subtract mentally review

列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?