Question

17/99×57+19/99×48怎么简便计算？

Answer 1

17/99×57+19/99×48，简便运算。
解：17/99×57+19/99×48
=17/99x19x3+19/99x16x3
=17/33x19+19/33x16
=19/33x17+19/33x16
=19/33x（17+16）
=19/33x33
=19
答：答案为19。

Answer 2

17/99×57+19/99×48,简便运算。 解:17/99×57+19/99×48 =17/99x19x3+19/99x16x3 =17/33x19+19/33x16 =19/33x17+19/33x16 =19/33x(17+16) =19/33x33 =19 答:答案为19。

Answer 3

17/99×57+19/99×48
=17/99x3x19+19/99x3x16
=(3x19)/99x(17+16)
=57/99x33
=57/33
=19/11。

Answer 4

原式=17/33×19+17/33×16+2/33×16
=17/33×(19+16)+32/33
=17/33×35+32/33
=17×(1+2/33)+32/33
=17+(34+32)/33
=17+2
=19.

Answer 5

148x57-48x57=（148-48）x57=100x57=5700逆用乘法分配率。