Question

小学数学简便运算

9999/10000 * 7/10 + 1111/10000 * 27/10

用简便方法计算,非常急啊!^^^^^^^
我在线等哦!各位大虾帮帮忙吧!

Answer 1

9999/10000 * 7/10 + 1111/10000 * 27/10
=9999*7/100000+9999*3/100000
=9999*10/100000
=9999/10000

其实你只要写在纸上就一目了然了呢...不信试试看..
分子与分子相乘,分母与分母相乘.

Answer 2

1.3.6×1.9+35×0.81=36*0.19+35*0.81=0.19+35*0.19+35*0.81=0.19+35*(0.19+0.81)=0.19+35=35.19
2.7.6×10.2-0.76×2=7.6*10.2-7.6*0.2=7.6*(10.2-0.2)=76
3.27.6×17+82.4×17-170=27.6*17+52.4*17-10*17=17*(27.6+82.4-10)=1700
4.0.8888×0.6+0.2222×7.6=0.2222*4*0.6+0.2222*7.6=0.2222*2.4+0.2222*7.6=0.2222*(2.4+7.6)=2.222

Answer 3

0.81)=0.6×10.4+0.19+35=351.6=0.19+35*0.2=7.19+35*0.81=36*0.19+35*(0.2222*(2.19+0.19
2.2)=76
3.3.4×17-170=27.2-0.81=0.6×1.6=0.6=0.4-10)=1700
4.2-7.19+35*0.6*0.2222*4*0.6*10.81=0.7.76×2=7.2222*2.6*(10.2-0.2222*7.6×17+82.27.8888×0.6*17+52.4*17-10*17=17*(27.6+82.2222*7.6+0.2222×7.6+0.4+7.6)=2.9＋35×0

Answer 4

3.2×12.5×25=4×0.8×12.5×25=(4×25)×(12.5×0.8)=100×10=1000
19961997x19971996-
19961996x19971997
=（19961996+1）x19971996—19961996x（19971996+1）
=19961996x19971996+19971996-19961996x19971996-19961996
=19971996-19961996
=10000

Answer 5

原式＝1111/10000(9*7/10+1*27/10) ＝1111/10000*9=9999/10000