Attached is the problem set for practicing addition and subtraction

Brief recap: Example1: In class1, we saw the below example of adding 2 single digit numbers.

Table of 11 11 x 1 = 11 11 x 2 = 22 11×3 = 33 11×4 = 44 11×5 = 55 11×6=66 11×7=77 11×8=88 11×9=99 11×10=110 Table of 12 12×1=12 12×2=24 12×3=36 12×4=48 12×5=60 12×6=72 12×7=84 12×8=96 12×9=108 12×10=120 Table of 13 13×1=13 13×2=26 13×3=39 13×4=52 13×5=65 13×6=78 13×7=91 13×8=104 13×9=117 13×10=130 Table of 14 14×1=14 14×2=28 14×3=42 14×4=56 14×5=70 14×6=84 14×7=98 14×8=112 14×9=126...