Question

72+21减63等于几

Answer 1

加减法是同级运算，按从左往右的顺序依次计算。72+21-63=30

Answer 2

72+21-63=30这是一道加减的混合运算。
72+21-63
=93-63
=30

Answer 3

72+21减63等于几这是一道小学数学题。72+21-63等于30

Answer 4

72+21减63等于30
72+21-63
=93-63
=30

Answer 5

72+21减63等于30
72+21-63=93-63=30