3×0.5的3种递等式计算
问题描述:
3×0.5的3种递等式计算
答
3x0.5
=1.5x(2x0.5)
=1.5x1
=1.5
3x0.5
=(3÷2)x(0.5x2)
=1.5x1
=1.5
3x0.5
=3x1/2
=3/2