數(shù)學(xué)北師大版二年級上冊做個乘法表.ppt

二年級數(shù)學(xué)上冊第八單元69的乘法口訣,順河小學(xué)：張華超,1課時,學(xué)習(xí)目標(biāo)1.對已學(xué)過的乘法口訣進(jìn)行整理，理解乘法口訣之間的關(guān)系，進(jìn)一步鞏固乘法口訣。2.通過有規(guī)律地記憶乘法口訣，加深對乘法意義的理解。3.初步學(xué)習(xí)整理知識的方法，初步發(fā)展觀察和表達(dá)能力。4.體驗發(fā)現(xiàn)規(guī)律的快樂，感受乘法口訣的魅力。,這些算式乘數(shù)中都有3.,把哪些算式排在一起？,找出乘數(shù)中有3的乘法算式，并完成下表。,1,3,3,2,3,6,3,3,9,4,3,12,5,3,15,6,3,18,7,3,21,8,3,24,9,3,27,把哪些算式排在一起？,這些算式的積都是18.,找出積是18的乘法算式，并填一填。,2,9,18,3,6,18,9,2,18,6,3,18,下面是淘氣做的乘法表，你能幫他填完整嗎？,12=2,13=3,14=4,15=5,16=6,17=7,18=8,19=9,21=2,23=6,25=10,26=12,28=16,29=18,32=6,33=9,34=12,36=18,37=21,38=24,31=3,41=4,42=8,43=12,44=16,45=20,47=28,49=36,51=5,52=10,53=15,54=20,56=30,57=35,59=45,61=6,62=12,64=24,65=30,66=36,67=42,68=48,73=21,74=28,75=35,76=42,78=56,71=7,79=63,82=16,83=24,84=32,85=40,86=48,87=56,88=64,91=9,92=18,93=27,95=45,96=54,98=72,99=81,22=4,24=,39=,27=,35=,46=,48=,55=,58=,63=,69=,72=,77=,81=,89=,94=,97=,11=4,8,14,15,27,24,32,25,40,18,54,14,49,8,72,36,63,小九九乘法表,12=2,13=3,14=4,15=5,16=6,17=7,18=8,19=9,23=6,25=10,26=12,28=16,29=18,33=9,34=12,36=18,37=21,38=24,44=16,45=20,47=28,49=36,56=30,57=35,59=45,66=36,67=42,68=48,78=56,79=63,88=64,99=81,22=4,24=8,39=27,27=,35=15,46=,48=32,55=,58=40,69=54,77=,89=72,11=4,14,24,25,49,算一算，猜一猜。,把乘法口訣填完整。,三七五九七九七八四六六六五七八八,二十一四十五六十三五十六二十四三十六三十五六十四,從“18，27，3，9，6”中選出幾個數(shù)，組成兩道乘法算式和兩道除法算式。,9,3,27,18,6,3,6,3,18,27,3,9,3,9,3,6,9,3,3,6,座位夠嗎？,85=40（人）,4038,答：座位夠。,做一個轉(zhuǎn)盤，轉(zhuǎn)一轉(zhuǎn)，算一算。,想一想，算一算。,2+4+8=2,3+6+9=3,1個2,2個2,4個2,一共有7個2,1個3,2個3,3個3,一共有6個3,先求前面三個數(shù)的和，三個數(shù)