课件11张PPT。练 习 五北师大版一年级数学上册课件15–7=15–8=15–9=16–7=16–8=16–9=14–6=14–7=14–8=12–4=13–4=14–4=8769878768910869729谁钓得多?12–3911–47135813 – 5 = 8⒍算一算,看看你发现了什么?13–4=13–5=13–6=13–7=13–8=13–9=13–10=13–11=98765432⒎送信。14– 818– 914– 513– 717– 817– 911– 414– 712– 313– 516– 815– 5