问题
判断题
判断下面的计算是(√)否(×)正确。
( ) 1. three + four －five = two
( ) 2. five + four －three = four
( ) 3. six + two －four = five
( ) 4. nine + five －two = seven
( ) 5. seven + one －four = four
答案
1. √ 2. × 3. × 4. × 5. √