怎样简便就怎样计算。
|
| (1)原式=(285+115)+(74+226) = 400+300 =700 |
(2)原式=(63+137)+(152+148) =200+300 =500 |
| (3)原式=394-(157+43) =394-200 =194 |
(4)原式=69×100+69 =6900+69 =6969 |
| (5)原式= 40×25×8×125 =1000×1000 =1000000 |
(6)原式=65×(4×25) =65×100 =6500 |
| (7)原式=960÷4÷24 =240÷24 =10 |
(8)原式=147×(57+43) =147×100 =14700 |
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