问题
解答题
怎样算简便就怎样算.
12.5×8.88
1.9+19.9+199.9+0.3
10.01×101-10.01.
答案
①12.5×8.88
=12.5×(1.11×8)
=(12.5×8)×1.11
=100×1.11
=111
②1.9+19.9+199.9+0.3
=1.9+19.9+199.9+0.1+0.1+0.1
=(1.9+0.1)+(19.9+0.1)+(199.9+0.1)
=2+20+200
=222
③10.01×101-10.01
=10.01×(101-1)
=10.01×100
=1001