五年级上册数学口算题.docx

文档介绍：1.
2,即：a x = a
2.
10,变成了原来的十分之一，即:
1
ax = a — 10 = a x 而
x 4=
0. 07
x =
33
x =

x 4=
x =
15
x =

x =

x =
54 x =

x =

x =

x 100=
x =

x =
25
x =

x =
6x =

x =

x =

x =
x =

x =

x =

x 20=
x =
3
x =

x =

x =
x =
23
x =

x 100=

x 2=
x 10=
0
x =

x 4=

x =
x =
60
x =

x =

x 8=
4-=
82-=
19+
=
-=
+=
-= -
=
+=
-=
1-= +=
5x 400=
+ =
187- 1000=
1+=
x 10=
75-10=
- 8=
x 7=
x 7=
x 8=
x 8=
x 2=
5x =
x =
x =
x 0=
10x =
x 7=
x 100=
x 4=
x 4=
4x =
430-250= +=
-=
7200-800=
+= -=
17x300=
-=
+=
600x = +=
+=
670+250= +=
-6=
+=
3+=
630- 9=
-=
-5=
330X 9=
-= -=
+=
1-= += +=
+4=
4-=
+=
+=
+=
23X 100=
-=
480- 40=
- 100=
+=