三年级数学下册三《乘法》找规律一课三练北师大版.doc

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1、1找 规 律淘淘猫导学基础碰碰车知识点 1 口算乘数是整十数的乘法1我会算,我会比。62= 133= 85= 74=620= 1330= 85= 70=1303= 805= 704=知识点 2 因数的变化与积的变化规律1 把表格填写完整。乘数 2 2 20 20乘数 5 50 50 500积知识点 3 口算整百数乘整十数的乘法3想一想,你是怎样算的?40020= 80010= 40500= 10090=60030= 70060= 80300= 40900=80070= 30050=2升级跷跷板4比一比,看谁先回到家?5在 O 里填上“” “”或“=” 。8060 8065 1O18 20281

2、240 48I0 7330 20376脱式计算。2540780 19601758001630 2602280智慧摩天轮1小兔去河边要走 4 千米的路。一天小兔去河边,每分大约走70 米,走了 14 分正好经过小狗家。(1)你能标出小狗家大概的位置吗?(2)小狗家离河边有多远?答案与点拨1. 12 120 1200 39 390 3900 40 400 4000 28 280 28002. 10 100 1000 100003. 8000 8000 20000 9000 18000 42000 24000 36000 56000 1500034. 600 3600 900 680 960 760 780 15006. 220 1315 320 20207. (2)40007014=3020(米)

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