《2019春一年級(jí)數(shù)學(xué)下冊(cè) 6.2《兩位數(shù)加一位數(shù)和整十?dāng)?shù)》(不進(jìn)位)課件1 (新版)新人教版.ppt》由會(huì)員分享,可在線閱讀,更多相關(guān)《2019春一年級(jí)數(shù)學(xué)下冊(cè) 6.2《兩位數(shù)加一位數(shù)和整十?dāng)?shù)》(不進(jìn)位)課件1 (新版)新人教版.ppt(32頁(yè)珍藏版)》請(qǐng)?jiān)谘b配圖網(wǎng)上搜索。
1、兩位數(shù)加一位數(shù)和整十?dāng)?shù)不進(jìn)位,4,50,說(shuō)出下列各數(shù)的分成,8,6,你會(huì)提出什么數(shù)學(xué)問(wèn)題?,數(shù)學(xué) 一年級(jí)下冊(cè),數(shù)學(xué) 一年級(jí)下冊(cè),數(shù)學(xué) 一年級(jí)下冊(cè),(1)數(shù)學(xué)書(shū)有多少本?,35 +3 = ?,35 +3 =,,5 +3 = 8,,5,,38,把個(gè)位上的數(shù)相加。,35 +30 = ?,(2)一包數(shù)學(xué)書(shū)和一包語(yǔ)文書(shū)一共有多少本?,35 +30 =,,30 +30 = 60,,3,,65,闖關(guān)游戲,第一關(guān),擺一擺,算一算,342,,6,6,36,3420,,50,50,54,,,,,3420,50,50,54,342,36,6,6,第二關(guān):想一想,45 + 3 = 23 + 30 = (
2、 ) ( ) ( ) ( ) ( ) ( ),,,,,,,,,,,40,5,8,48,20,3,50,53,第三關(guān):看圖列式,(1),20,17,,,37,(2),,,42,5,,47,39,75,45,72,26,71,20+40=,5+30=,16+3=,32+20=,60,53,29,34,24,35,52,19,48,79,89,給小鳥(niǎo)找家,74,95,71+8,44+30,20+69,25+70,6+42,,,,,,,,,20+3,23,25+3,28,76+3,79,2+30,32,20+30,50,69+30,99,今天你學(xué)會(huì)了什么?,34+2=54,5+13=68,40+
3、50=45,64+30=67,36,18,90,94,34+2=54,36,哪些蘋(píng)果生病了?,有23個(gè)男生,一共有多少個(gè)學(xué)生?,20+23=43(個(gè)),23+20=43(個(gè)),我們班有20個(gè)女生,做一做,35 + 4 =,35 + 40 =,42 + 3 =,5 + 21 =,42 + 30 =,50 + 21 =,,,30,5,,,30,5,,,40,2,,,40,2,,,20,1,,,20,1,,,9,,,5,,,6,,,70,,,70,,,70,45,39,26,75,72,71,,,,,,,1.,534 627 531 862 472 443,57,69,36,88,76,47
4、,2.,5320 5031 7220 6430 2067 4530,73,,81,,92,94,87,75,,20 25 76,2 20 69,,,,,,,,3,30,23,28,79,32,50,99,4.,,,23,9,,60,8,5,30,,,,,,,,,,,,,,,做加法,試一試,你準(zhǔn)行!,53,28,32,83,31,8+50,48+5,9+83,10+35,30+27,3+45,26+7,49+7,57+5,摘蘋(píng)果,一共有多少只兔?,25+8=33(只),跳繩比賽,一共跳了多少下?,一共跳了多少下?,25+30=55(下),33+20=53(下),誰(shuí)贏了?,,46元,35元,我?guī)Я?0元錢(qián),想買(mǎi)這兩個(gè)玩具,錢(qián)夠嗎?,35+46=?,,,23人,6人,賽跑和跳高的學(xué)生一共有多少人?,23,,6,29,(人),