ʱ : [好卷]新人教版小升初总复习数学归类讲解及训练(?含答? - 百度文库ϿʼĶ
⣺סʵࢪס
12.5? =
1
5000001 = 12.5 500000 = 6250000
6250000ף= 62.5ǧ
5仯
Ҫ㣺һƽͼΰһınŴСԭļ֮һ
ŴСǰͼεn211n2
⣺ĴһСΰŴõͼΡֱǵijͿ
СıǼȼ
Сεij2.5ף1ףεij7.5ף3סСγı7.5 2.5 = 3 1ı3 1
1ŴСnε7.5?337.5 = = = 9 1 = 32 1
Сε2.5?112.5Сı9 1 3ͳɷ 1ͼ
Ҫ㣺һ仯һҲű仯Ӧı
ıֵҲ̣һͽ֮Ĺϵϵ
ĸֱͣʾãʾǵıֵϵʽӱʾ
y = һá㷨ԵõͼͼһֱߡͼxһֵһӦֵ
⣺ϸ۲±˼֮йϵʲôϵΪʲô 1
5
/ ܼ/Ԫ 1 3 6 8 10 20 4 12 24 32 40 80 41224 = 4 = 4 = 4 136Ϊ
ܼ = ۣһԵһʱܼۺ ⣺ԲIJܳ
һʱ 루 һʱ 루
⣺ijֽÿСʱֽ1.5֣2Сʱ3Сʱֽٶ֣
ֽʱ/ʱ ֽ/ 1 2 3 4 1.5 ݱеݣͼֽʱֽӦĵ㣬ٰ
/
6 5 4 3 2
1 0
1 2 3 4 5 6 7 ʱ/ʱ
ֽֽʱΪʲô Ϊ
ֽ = ÿСʱֽһÿСʱֽһʱֽֽʱ
ֽʱ
6
ͼжϣ5Сʱֽٶ֣ ͼжϣ5Сʱֽ7.5 2
Ҫ㣺һ仯һҲű仯Ӧij
һͽɷ֮Ĺϵϵ
ĸֱͣʾãʾǵĻϵʽӱʾ = һ
⣺ϸ۲±˼֮йϵʲôϵΪʲô60ԪǮʼ
ʼDZĵۺͿԹ±
/Ԫ / 1.5 2 3 4 5 6 40 30 20 15 12 10 1.5 40 = 60 2 30 = 60 4 15 = 60 Ϊ = ܼۣһܼһʱۺɷ
⣺ԲIJܳе һʱ 루 ɷ
ռͼ 1ԲԲ 1ԲԲ
Բ ȫͬԲΡ 棬ظչdzΡ Բ һ棬ԲΡ 棬ض㵽Բϵһ߶μչΡ ֮ľඥ㵽Բĵľ룬ֻ룬 һ 2Բı 7
Ҫ㣺ԲIJ = ܳ
Բı = + 2
ԲռռĴСԲԲݻ = ߣúĸʽӱʾǣV = sh V = r2h
⣺ƤһԲ̴ѣҪֱ3ף15ף̴Ҫ
Ƥƽףͷƣƽף
3.14 3 15 = 141.3ƽף 142ƽף
⣺һԲˮأܳ25.12ף4ףˮܼײ Ĩˮࡣ
ÿƽҪˮ20ǧˣһҪöǧˮࣿ
25.12 3.14 2 = 4ף 3.14 4 2 = 50.24ƽף 25.12 4 = 100.48ƽף 50.24 + 100.48 = 150.72ƽף ˮ 150.72 20 = 3014.4ǧ
⣺ֱ0.8ˮУˮٶÿ2ףô1ˮжף
3.14 0.822 2 60 = 60.288ף
3Բ
Ҫ㣺ԲռռĴСԲԲȵȸߵԲ֮һ
V =
11sh V = r2h 33⣺һԲaףȵȸߵԲ( )
⣺һԲһԲ壬Բ6ףԲ( ) ⣺һԲɳѣ1.5ף뾶2ףÿɳ1.8֡ɳԼضٶ֣
13.14 2 21.51.8 = 11.304֣ 32ͼεķŴС
Ҫ㣺һͼΰһȷŴСǰÿ߰һıȷŴС
⣺һųͼƬ12ף9ס1 3ıСͼƬijǣ ף
ǣ ףͼƬ 䣬С
8