Maths Board #1
(1) × (3) : (1) =3
(4) + (3) : (3) =4
(2) × (7) × (2) =7
=6 =8 =2

Maths Board #2
(5) + (6) - (5) =6
(2) + (7) - (1) =8
(1) + (4) - (1) =4
=4 =9 =3

Explanation
Maths Board #1
Horizontally; {1×3 =3, 3:1 =3} {4+3 =7, 7-3 =4} {2×7 =14, 14:2 =7}
Vertically; {1×4 =4, 4+2 =6} {3:3 =1, 1+7=8} {1+3 =4, 4-2 =2}

Maths Board #2
Horizontally; {5+6 =11, 11-5 =6} {2+7 =9, 9-1 =8} {1+4 =5, 5-1 =4}
Vertically; {5-2 =3, 3+1 =4} {6+7 =13, 13-4 =9} {5-1 =4, 4-1 =3}
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