五年级数学上册《小数的巧算》例题+答案,提升必备!

五年级数学上册《小数的巧算》例题+答案,提升必备!


简介:
(1)0.38×7.6+0.38÷2.5+0.38×2 =0.38×7.6+0.38×0.4+0.38×2 =0.38×(7.6+0.4+2) =0.38×10 =3.8 (2)36×2.54+1.8×49.2 =1.8×20×2.54+1.8×49.2 =1.8×(20×2.54)+1.8×49.2 =1.8×(50.8+49.2) =1.8×100 =180 (3)1994+199.4+19.94+1.994 =2000+200+20+2-6-0.6-0.06-0.006 =2222-6.666 =2215.334 (4)6.3+15.4+0.09+3.7+14.6 =(6.3+3.7)+(14.6+15.4)+0.09 =40+0.09 =40.09