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14 · 5 =10*5+4*5=50+20=70
19 · 3 =10*3+9*3=30+27=57
17 · 5 10*5+7*5=50+35=85
54 ÷ 6 =9
42 ÷ 7 =6
63 ÷ 9 =7
51 ÷ 3 =17
88 ÷ 4 =22
75 ÷ 5 =15
14 · 5 = (10*5)+(4*5)= 50+20= 70
19 · 3 = (10*3)+(9*3)= 30+27=57
17 · 5 = (10*5)+(7*5)= 50+35=85
54 ÷ 6 = (60:6)-(6:6)=10-1= 9
42 ÷ 7 = (70:7)-(28:7)= 10-4= 6
63 ÷ 9 =(90:9)-(27:9)= 10-3= 7
51 ÷ 3 = (60:3)-(9:3)= 20-3= 17
88 ÷ 4 = (80:4)+(8:4)= 20+2= 22
75 ÷ 5 = (50:5)+(25:5)= 10+5= 15