题目

口算。33÷3=420×2=120×4= 68÷2=25×30=41×3=230×3= 3×220=88÷4= 80÷2=33×2=40×60=15×40= 25×4= 48÷8= 90÷9=700×7=24×5=50×80= 0×144=4000÷5= 13×20= 560÷7= 400×20=2.3+3.4= 5.6-3.5= 8+1.7= 9.5-3.5=803+297≈ 72×18≈ 243÷4= 1004-502≈60÷2×0=360+200-300=20×（40+30）= 240-100×2= 答案：33÷3=11 420×2=840120×4=480 68÷2=34 25×30=750 41×3=123230×3=690 3×220=660 88÷4=22 80÷2=40 33×2=6640×60=2400 15×40=600 25×4=10048÷8=6 90÷9=10 700×7=4900 24×5=12050×80=40000×144=0 4000÷5=800 13×20=260 560÷7=80 400×20=8000 2.3+3.4=5.7 5.6-3.5=2.1 8+1.7=9.79.5-3.5=6 803+297≈110072×18≈1400 243÷4=60……3 1004-502≈500 60÷2×0=0 360+200-300=260 20×（40+30）=140听对话，回答问题。1. What does the man mean? A. He is practising English. B. He didn't understand her. C. He doesn't want to help her.