1. 根据乘法写除法。
3×8 = 24
102×50 = 5100
14×80 = 1120
3500÷20 =
1600÷16 =
1200÷60 =
40×180 =
108×90 =
106×50 =
125×8÷10 =
25×4÷100 =
25×5÷125 =
25×4÷20 =
12×800 =
906×7 =
70×900 =
800×(4 - 3) =
100÷50×2 =
810÷90 =
6×300 + 4 =
864÷9 =
9200÷46 =
170×20 =
780÷13 =
( )×9 = 495
( )÷9 = 91
224÷( ) = 32
( )÷7 = 43
77×( ) = 231
800 = 40×( )
250÷( ) = 50
120×( ) = 360
240÷( ) = 24
350÷( ) = 7
( )÷10 = 750
600÷( ) + 6 = 46
( )÷7 + 4 = 32
( )÷7 + 1 = 51
( )÷5 + 5 = 40
6×( ) + 3 = 33
5×( ) + 4 = 24
100÷( ) + 5 = 25
( )×3 + 2 = 182
( )×20 + 5 = 105
( )÷6 - 5 = 115

2. 根据除法写乘法。
36÷9 = 4
1125÷25 = 45
720÷12 = 60