Question

90-(5x3);49-(4x3);24+3x6

Answer 1

90-(5×3)=90 -15 =75
49 -(4×3) =49 -12 =37
24 +(3×6)=24 +18 =42

Answer 2

90-(5×3)=75
90-15=
75

49-(4×3)=37
49-12
37

24+3×6=42
24+18
42