12×5=
4×25=
125×8=
56÷8=
450÷18=
52+48=
100﹣58=
0÷78+78=
6000÷125÷8=
57+13﹣57+13=
4.8+2.1= 6.7-0.5= 0÷280= 264-(64+23)=
9-2.9= 4.2+8= 32-2×0= 6×6÷6×6=
25×4×3=
15×6×3=
(4+8)×25=
16×125=
7×99+7=
0.5÷10=
413-57-43=
63÷100×10=
⑴90200009200000 ⑵28亿2800000000
⑶125×80250×40 ⑷10个一百万1亿
0.9+1.3=
4.8-1.6=
2.5+6.5=
1-0.7=
29÷100=
7.01×1000=
a×8=
9×b-2×b=
5.8﹣4=
3.8+0.12=
3.1×0.03=
0.25+0.75=
1.9×30=
1.25×8=
0.8×5×6=
52=
+=
1-=
--=
-+=
-=
++=