第1个回答 2021-06-14
3.33×9.9+9.9×6.7
=9.9x(3.33+6.7)
=9.9x(10 +0.03)
=99 +9.9x0.03
=99 +0.297
=99.297
第2个回答 2021-06-14
3.33x99+9.9x6.7
=(3.33+6.7)x9.9
=10x9.9
=99
第3个回答 2021-06-14
=(3.33+6.7)x9.9
=10.03x9.9
=10.03x(10-0.1)
=10.03x10-10.03x0.1
=100.3-1.003
=100.297