100道有理数加减法口算题
问题描述:
100道有理数加减法口算题
答
1.2+6296-733+23+4015+4= 23+53.7+129-3.38-315-4= 18-230+8.43+186+270+3= 30-2742-6426.6-4.39-220-9= 53+53.5+239-4.8+5020-1= 40+662+0.789-563+334-2= 50-4.11+25534-36...