（1+1/2)(1+1/3)(1+1/4).(1+1/100) （1-1/2)(1-1/3)(1-1/4).(1-1/100) 25*4/25*4 7.26-(5.26-1.5) 6.25+3.85-2.125+3.875 9-2456*21 0.5/11.5-4*2.75 3.375+5.75+2.25+6.625 1001－9036÷18 3.8×5.25+14.5 2.1*4.3+...