A-A+
口算. 800-250=30×40=8100÷900=10-0.98=105÷7=560+7
问题详情
口算.
参考答案
800-250=550,30×40=1200,8100÷900=9,10-0.98=9.02,105÷7=15,560+770=1330,0.25×0.4=0.1,6.3÷0.07=90,0.64÷8=0.08,8.85×10=88.5,4.73+0.7=5.43,39+79=109,58×410=14,56÷3=518,58-12=18,3.6×14=0.9,8×1.36×1.25=13.6,7.2×2.8+2.8×0.8=22.4.
考点:口算