Sample questions Class 2, medium level. Your worksheet will have new questions. 1.71 − 15 = ___71−152.61 − 36 = ___61−363.71 − 22 = ___71−224.63 − 48 = ___63−485.91 − 74 = ___91−746.85 − 78 = ___85−787.71 − 59 = ___71−598.30 − 28 = ___30−28