8×32×9            8×87×9         3×84×6

6×97×8            3×72×8        6×8+88×8-8

7×=42           ×6=24              9×=54

30÷=5           28÷=7          16÷=4

45+13=     7×6=       45-18=      81-21=    30÷5=

5×9=      56-29=      36÷6=      34+18=     7×9=

3×6=         40-7=         20+39=        7×8=         7×4+20=

35+6=        9×4=         34-6=         6×5=         42+28-34=

56-3=         54-21=         7×6=         2×8=        78-（8+9）=

5×7=          3×9=         42-9=         52-7=         9×9-8=