简算
|
| ①546-127-373 =546-(127+373) =546-500 =46 ②76+141+59+124 =(76+124)+(141+59) =200+200 =400 ③645-180-245 =645-245-180 =400-180 =220 ④38×99+38 =38×(99+1) =38×100 =3800 ⑤3000÷125÷8 =3000÷(125×8) =3000÷1000 =3 ⑥175×56+25×56 =56×(175+25) =56×200 =11200 |
关注公众号回复:奥数答案
即可免费获得密码查看答案

[ ]
a.12×(4+25)[ ]
a. 47+(14×5)(1)35+65=
65+35=
35+65○65+35