77%×99+23%×99 = =
问题描述:
77%×99+23%×99 = =
答
77%×99+23%×99 =
99x(77%+23%)=99x100%=99
77%×99+23%×99 = =
77%×99+23%×99 =
99x(77%+23%)=99x100%=99