人教版五年級數(shù)學(xué)下冊《長方體和正方體的表面積》課件PPT_1[優(yōu)制課堂]

1、?pp_x? 1? ?寵寰 ?ri? ?a 1教育專類4?1.?t? ?7?tc ?7?7adt?(1)?7湯 (6) ?1?) ?7c? ?d? (?a?湯) ?7湯?a?湯dB 6 ?1?) (?t? ?湯?湯?湯)?Btc(2)?湯?a? ?湯dB ?dt? (?7湯)c7? ? ?7?7?7c(4)? ?7?7?7c ?a?o?)(48)?.4?4?2教育專類?c?u?_u3教育專類?i?u ?i?u ?_u ?u ? 4教育專類前前上上下下左左右右后后?i?u ?i?u ?ra=?pu ?p?寰2 ?_u ?a?寰 ?ra=?pu ?_?u 2?u ? ?ra=?_?u ?p?寰 2

2、5教育專類?a?d? ?1? ?) ?d?a ?d? ?a?d? 6?1?) ?7?7c ?) ?a?d? ?1? ?) 7a?)?a .6教育專類?c?u?_u ?a?d? ?1? ?) ?a? ?)?a?d? ?1? ?)=?7?7?7c ?ad湯 +?7?7?7c ?d?c +?ad湯 ?d?c7教育專類6?i?i?4?i?i?5?i?i?1-? ?a ?_?u 652+642+542=60+48+40=1482-? ?a ?_?u(65+64+54) 2= (30+24+20) 2=742=148?7?7?7c6? ?湯?ad湯5? ?湯?d?c4 ? ?60 ?6?b?b ?6?6?

3、 ?o ? ? ?d?d? ?7a?湯?a?d? 6?1?) ?.?c ?c ?7?7?7c?1?) 6? 湯da?湯? 5 ? )? 60 ?a?湯 ? ?ad?c耀 ?)d湯 ?1?) c7?7?7? 6? 湯da?湯? 4 ? ? ?) 48 ?a?湯 ? ?tc ?t? ?1?) c7?7?7? 5? 湯da?湯? 4 ? ? ?) 40 ?a?湯 ? .? :?c a?odt? 148 ?a?湯 ? ?d?d? 7a?湯.(?x?x1寰 ?i?i)?(?x?x1寰 ?i?i)?8教育專類4?i?3?i?2.5?i?1-? ?a ?_?u432+42.52+32.52=24+20+15

4、=591-? ?a ?_?u (43+42.5+32.5) 2=(12+10+7.5) 2=29.52=59?d?B?c ?1? :?7?7?7c4 ? ?湯?ad湯3? ?湯?d?c2.5 ? ?60 ?6?b?b ?0 ?6? ? ?6? ? ?6?6?o(?886? ?6? ? ?b?)? :?1? ?) 59 ?a?湯 ?6? .?a?湯 ?x?x1寰 ?i?9教育專類4?i?2.5?i?3?i?=12+20+15=4743+42.52+32.52?d?B?c ?1? :?7?7?7c4 ? ?湯?ad湯3? ?湯?d?c2.5 ? ?60 ?6?b?b ?0 ?6? ? ?6? ?

5、?6?6?o(?886? ?6? ? ?b?)?7) ?d? ?B? ? ?c ?t) ?dt? ?a ?d?d?c ?1? ?) d? ?7a?dt? :?c ?t) ?dt? ?1? ?) 47 ?a?湯 ?6? .(?x?x1寰 ?)10教育專類?c?u?_u11教育專類?c?_u?u?12教育專類?c?_u?u?13教育專類?u?c?_u14教育專類? ?1?a?寰?c?_u15教育專類?c?a?寰?1? ?_u16教育專類上上下下左左右右前前后后17教育專類?7湯 ?1? ?) ?a? ?)?c?_u?u? ?pu ? ?pu 6?寰a ? ?pu ?ix?x1寰 6 18教育專類3

6、?i?i?3?i?i?326=96=54（?x?x1寰 ?i?i）? ?7湯 ?湯dB ?d?d? ? ?7dt? ?7?7?7c 3? ?dt? ?1? ?) d? ?7a?dt?)tc ?1?:?7湯 6 ?1?) ?a? ?)? ?pu ? ?pu 6?x1?: ?ri? ?a54 ?x?x1寰 ?i?i. ?3?i?i?19教育專類325=95=45（?a?湯 ?）? ?7湯 ?湯dB ?d?d? ? ?7dt? ?7?7?7c 3? ?dt? ?1? ?) ?d? ?pu ? ?pu 5?x1?: ?ri? ?a45 ?a?湯 ?i?i? ? ?i寰3?i?i?3?i?i?3?i?i

7、?)tc ?1? :?d?dc ?7c d?d? ?o?ad? ?d?d? ? ? ?d?d? ?7a?湯20教育專類1.226=1.446=8.64(?x?x1寰 ?i?i?）?d?B?c ?1? :? ?7湯 ?湯dB ? ?7dt? ?7?7?7c 1.2?a ?dt? ?1? ?) ?d?寰? ?寵寰 ?ri? ?a=(? ?pu ? ?pu)6 r?a?x1?: ?ri? ?a8.64 ?x?x1寰 ?i?i?.21教育專類1.x?i ?i? ?寰 ?p.(1)?寰_?u?寰p?寰?pu ?u ?_寵 ?i ?p?i ?_?寵 ?寰 ? ?piu.( ) (2) ? ?pu 4?i?

8、i? ?_寵 ?寰?寵 ?_?寵 ?u? ?ri? ?a ?i ?u ?_?寵 4 46?011a ?96 ? ? ?11a ( ) (3)?i ?x? ?u ?_寵 ?寵寰 ?i寰?寵 ?寵 ? ?寰 ? ?p ?_寵 ?寵寰 ?ri? ?a ?寰?p?u ?i ?x? ?寵寰 ?ri? ?a ?寰 ?_?寵.( ) 2.?寵寰 ?ri? ?a ? ?2.?寵寰 6 ?ra ?a ?寵寰 ?ri? ?a ?_?寵.2.?寵寰 ?ri? ?a ?x? ?i? ?pu ? ?pu 6? ?pu ?ix?x1寰 6 ?寰a22教育專類10?5?i?i?6?i?i?5?i?i?5?5?i?i?寰?1

9、i ?p寰? ?ri? ?a ?x? ?i23教育專類10?i?i?5?i?i?5?i?i?寵 ?_i ?寰 ?寰?寰iu ?1?i? ?aa?i ?_?寵 ?u? ? ? ?p寵 a?u ?_?寵 ? ?x?u ?u ?p? ? ?_?x1i? ?寵24教育專類?d?ri1x ?寵 ?pp_x? ?pp寰? ? ?a? ?寰?_寰 ?a ?a?x ?寰?_寰 ?i? ?寰 x? ?u?_? ? ?寵.ix?u ? ?a ?i?寰(a ) ?ra ?a ?a ?i?寰(c )?_寰?ra ?p_?u ?a ?a ?( ?d )?ra ?a.a .?u?a?寰?_u ?rab .?u?a?寰?_

10、u ?u?i?u?i? ?rac .?u?a?寰?_u ?u?i? ?rad .?i?u ?ra25教育專類? ?pu 5?i?i? ?_寵 ?u ?a ?p寵 ? ?a ?u ?p? ?a?u ?i寰(?u ?a ?a? ?_?i ?a?p)26教育專類50108?7?7?7c 50? 湯da?湯? 10 ? c?d?湯? 8? ?odt? ? ? ?湯?c ?7? ?1B?) ? ? ?7a?湯27教育專類?a7?)B ?7? ?7?7?7c 4? 湯da?湯? 3 ? c?d?湯? 3? .?)?c d?c (?B?c ?d?a 5 ?a?湯 ? ?d) 7a)d?c) ?d?d? ? ?dt? c?)? d湯B? ? ?d?d? ?7a?湯28教育專類2424 6(2412) (24 12) 6?7?7?7c 24? ?odt? ? ?a? ?a)? ? ?7湯 ?d?) 7? ?7湯 ?1? ?) d? ?a?湯 ? ?7a?dt?29教育專類? ?7?7?7c 1? ?odt? 3 d?a ?7湯 ?a?湯?a? ?湯dB ?od?) ?dt? ?7c ?1? ?)( a ).a14 ?a?湯 ? .b 16 ?a?湯 ? c .18?a?湯 ?30教育專