9.99×12+99.9×8.8 用简便算法
问题描述:
9.99×12+99.9×8.8 用简便算法
答
=99.9×1.2+99.9×8.8
=99.9×(1.2+8.8)
=99.9×10
=999
答
99.9*8.8=9.99*88
9.99*12+9.99*88=9.99*100=999!!
答
9.99×12+99.9×8.8
=99.9*1.2+99.9*8.8
=99.9*10
=999
答
9.99×12+99.9×8.8
=9.99×12+9.99×10×8.8
=9.99×12+9.99×88
=9.99×(12+88)
=9.99×100
=999
答
9.99×12+99.9×8.8
=9.99*12+9.99*88
=9.99*(12+88)
=9.99*100
=999