用简便算法计算下列各题。
|
| (1)原式=(25×4)×79 =100×79 =7900 |
(2)原式=(8×125)×7 =1000×7 =7000 |
| (3)原式=15×(63+37) =15×100 =1500 |
(4)原式=75×(98+2) =75×100 =7500 |
| (5)原式=(80×125)×47 =10000×47 = 470000 |
(6)原式=125×(100+8) =12500+1000 =13500 |
| (7)原式=367×(125×8) =367×1000 =367000 |
(8)原式=(101-1)×25 =100×25 =2500 |
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