最新 五年级口算题 17×40=680,100-63=37,3.2+1.68=4.88,2.8×0.4=1.12 14-7.4=6.6,1.92÷0.04=48,0.32×500=160,0.65+4.35=5 10-5.4=4.6,4÷20=0.2,3...... 2026-05-04 0