一．100道口算17×40, 100－63, 3.2＋1.68, 2.8×0.414－7.4 1.92÷0.040.32×500 0.65＋4.3510－5.44÷20 3.5×2001.5－0.060.75÷15 0.4×0.8 4×0.25 0.36＋1.541.01×99 420÷35 25×12 135÷0.53/4 + 1/4 2 + 4... 一．100道口算17×40, 100－63, 3.2＋1.68, 2.8×0.414－7.4 1.92÷0.040.32×500 0.65＋4.3510－5.44÷20 3.5×2001.5－0.060.75÷15 0.4×0.8 4×0.25 0.36＋1.541.01×99 420÷35 25×12 135÷0.53/4 + 1/4 2 + 4...