1. ,
384+1,538=
2,805-427=
425X4=
306x3=
16:8=
8x3:2=
15+7x2=

2. 6x10-3x7=
8: (3+5)x2=
:
60x30=_____
___x10=____
15x____=1,500
25:5=_____
14:3=______
___:3=8
12:____=6
371:____=1
644x___=644
6x2=
><=
245-19 245-17

3. /
><

4. :
-
-
-

5. -
-
-
-
 