13.5X10+13.5X0.1+6.5X10-6.5X0.1 不要想太多,这是最快最简单的
13.5.x100.2
=13.5*100+13.5*0.2
=1350+2.7
=1352.7
6.5x998
=6.5*1000-6.5*2
=6500-13
=6487
满意采纳
13.5×10.1-1.35
=13.5×10.1-13.5×0.1
=13.5×(10.1-0.1)
=13.5×10
=135
56x9.9 +0.56x10
=56×9.9+56×0.1
=56×(9.9+0.1)
=56×10
=560
5.39x10.1-0.539用简便方法怎么算
5.39x10.1-0.539
=5.39×(10.1-0.1)
=5.39×10
=53.9
3.46×10.1
=3.46×(10+0.1)
=3.46×10+3.46×0.1
=34.6+0.346
=34.946
有异议欢迎追问~
无异议记得采纳~
0.36x10.1简便方法
=0.36*(10+0.1)
=0.36*10+0.36*0.1
=3.6+0.036
=3.636
27.45x10.1-2.745
=27.45x10.1-27.45x0.1
=27.45x(10.1-0.1)
=27.45x10
=274.5
45×10.1-4.5
=45×10.1-45×0.1
=45×(10.1-0.1)
=45×10
=450