Question

小学数学题99×45+45的简便计算

小学数学题99×45+45的简便计算

Answer 1

99×45+45
=99×45+1×45
=（99+1）×45
=100×45
=4500

Answer 2

99×45+45=（99+1）×45=100×45=4500
不明白继续问

Answer 3

99×45+45
=（99+1）×45
=100×45
=4500