Question

69Ⅹ45十31╳45的简算？

Answer 1

69Ⅹ45十31╳45
=（69+31）*45
=100*45
=4500
加油

Answer 2

把45提出来乘以小括号里面69+31，最后等于45×100=4500。

Answer 3

69×45+31×45
＝45×(69+31)
＝45×100
＝4500

Answer 4

69×45+31×45
=（69+31）×45
=100×45
=4500