文档介绍：-
. z.
24÷15=
×10=
×=
×=
×1000=
×=
×=
÷=
=
÷2=
÷28=
÷=
÷=
÷=
÷24=
×=
+=
÷4=
÷13=
÷5=
÷41=
10÷20=
-
. z.
24÷15=
×10=
×=
×=
×1000=
×=
×=
÷=
÷9=
÷=
÷2=
÷=
÷=
×100=
×8=
÷=
×4=
×=
÷=
×=
×=
×=
÷=
1÷=
×=
÷=
0÷=
×102=
9÷÷4=
××4=
〔＋〕×=
-=
-=
68+=
-=
1-=
+=
1+=
×10=
75÷10=
÷=
×7=
×7=
×8=
×8=
×2=
5×=
×=
×=
×0=
10×=
×7=
×100=
×4=
×4=
4×=
430-250=
7200÷800=
+=
17×300=
-=
600×700=
+=
670+250=
8500÷500=
-=
-
. z.
25×100=
-=
380-290=
3500÷70=
+3=
7500÷250=
+1=
-=
450+780=
3+=
630÷9=
-=
-5=
330×9=
-=
+=
1-=
+=
+=
+4=
4-=
+=
+=
+=
23×100=
-=
480÷40=
÷100=
+=
125×80=
÷10=
+=
70×12=
×100=
-=
-=
×10=
10+=
1-=
×1000=
+=
+=
×100=
-=
-=
63÷100=
-=
+=
80÷1000=
+=
-=
30×100=
-=
+=
+=
5+=
1-=
+=
+=
+=
+=
1-=
8-=
-=
+=
+=
-
. z.
-=
-=
-=
-=
10+=
-=
+=
-=
-=
1-=
-=
-=
+=
-=
-=
+0=
×8=
×4=
×0=
÷28=
÷=
÷=
÷=
÷24=
×=
+=
－=
÷4=
÷13=