小学简单数学填空并列式题

显示全部楼层 · 2008-10-15 17:49:25

1.20米比(
)米少20%.列式:(
);
2.(
)米比20米少20%.列式:(
);
3.35千克比(
)千克多40%.列式:(
);
4.(
)千克比35千克多40%.列式:(
).
>

千问 · 2008-10-15 17:49:25

1.20米比( 25 )米少20%.列式:20÷(1-20%)=25; 2.( 16 )米比20米少20%.列式:20*(1-20%)=16; 3.35千克比( 25 )千克多40%.列式:35÷(1+40%)=25; 4.( 49 )千克比35千克多40%.列式:35*(1+40%)=49....

千问 · 2008-10-15 17:49:25

1. 20 / (1-20%) = 252. 20 x (1-20%) = 163. 35 / (1+40%) = 254. 35 x (1+40%) = 49...

千问 · 2008-10-15 17:49:25

20 / (1-20%) = 25 2. 20 20 / (1-20%) = 25 20*(1-20%) = 1635 / (1+40%) = 2535 * (1+40%) = 49...

千问 · 2008-10-15 17:49:25

25,20/(1-0.2)16,20(1-0.2)25,35(1+0.4)49,35(1+0.4)...