文档介绍:简便计算
× × ÷5+ ×20 × 57+ ×42+
×-
简便计算
× × ÷5+ ×20 × 57+ ×42+
×- 32× + ×
8× 5 ÷15
9
16
60×( 5+4- 1)
15 ×+ ÷ 4
2 ÷ 121÷ 19
12
15
2
4
15
11
9
72
×%+5
× 1
2-6÷9
- 2
8 3
- +(
1 1
-613
)
8
4
13
26
3
4
4
20
666652
1
×
×
33334
3
× 254
+254× 1
2003×2004 -1
2
88+880
4
256
255
2003 2002 ×2004
255
256 725
×255
2000÷ 2000 2000
2291 ÷46 1
256×725
- 469
2001
11
44
1981 ×- 1982 ×