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(1)3 × 7=21
(2)3 × 5=15
(3)3 × 6=18
(4)3 × 3=9
(5)3 × 8=24
(6)3 × 4=12
(7)3 × 9=27
(8)3 × 1=3
(9)3 × 2=6
(10)3 × 4=12
(11)3 × 7=21
(12)3 × 6=18
(13)3 × 3=9
(14)3 × 5=15
(15)3 × 2=6
(16)3 × 9=27
(17)3 × 1=3
(18)3 × 8=24
(19)3 × 6=18
(20)3 × 7=21
(21)3 × 4=12
(22)3 × 9=27
(23)3 × 1=3
(24)3 × 3=9
(25)3 × 5=15
(26)3 × 8=24
(27)3 × 2=6
(28)3 × 8=24
(29)3 × 1=3
(30)3 × 9=27
(31)3 × 7=21
(32)3 × 5=15
(33)3 × 6=18
(34)3 × 2=6
(35)3 × 4=12
(36)3 × 3=9
(37)3 × 6=18
(38)3 × 4=12
(39)3 × 8=24
(40)3 × 5=15