人教版五年級(jí)數(shù)學(xué)下冊(cè)第三單元_長(zhǎng)方體和正方體的表面積練習(xí)課ppt

1、125cm5cm4cm4cm2.5cm2.5cm4cm4cm4cm4cm4cm4cm (54+52.5+42.5)2=(20+12.5+10)2=42.52=85(?rialr6? ia?a?) 446=166=96(?rialr6? ia?a?)3 (1212+1218+1218)2=(144+216+216)2=5762=1152(?rialr6? ia?a?) 12122+12184=288+864 =1152(?rialr6? ia?a?)12cm12cm18cm47512312?f06002：(cm)?00? ?f0006 ?0? ?06?0?angai? ? ?gGagG?TF?

2、?li?漩?.5?al?L6漩? ?a?iy?a?at ?4?ia? ?1?i rl?GgG?T ?0? ?1?i ?1a?agi漩?1.?0f ?l? ?0?6?0? ?0?0f? ?0 ?f06? 1?i2.?ria0?6 ?00? ?f0006 ? ?漩? 1?i3.?ria0?6 ?00? ?f0 ? 1?i4.?006 ?l0 ?0 a0 ?6?0?0 ?f060?6? 1?i5.?0?6?0? ?0?0f? ?00? ?0600? ?l0 f0?00? f0? ?f0?漩? 1?i6.?f0?6? ?0?6?0? ?0?0f? ?f?00f0 ?f060?6?漩? 1?i7.?0?

3、6?0? ?0?0f? ?6 ?f0?0 0?l ?f06?漩? 1?i8.?00f? ?000 ?f06? 1?i66-?0?78cm29cm25cm26cm26cm25cm212cm26cm24cm21.(1)?f0?a0l0 ?0?0?6?0? ?02 ?f00 ? ?0?0(2)?f0?a0l0 ?0?0?6?0? ?l ?l6 ? ?0?0(3)?f0?a0l0 ?0?0?6?0? ?06 ?06? ? ?0?08?l?漩? ?i?漩?l?漩?i?l?漩?i?漩?l?i?漩? ?漩?漩?2.?al?L6漩? ?i? ?i?ga? ?y? ?0?6?0? ?r?0f? ?0f0? ?0

4、6?29（504050784078）25040250782407823. ?i? ?l? f?0f? ? 50?000?006 ?f0?i?f40 ?f06?0r?000?006 7800?006 ?f6l2 002 0?0 0l? ?6 ?00l 66l2 .?2 0l? ?6 f6? ?0?0 0?0 0?0 ?00?f104646646264. 0?00l ?a000? ?f0?2 00 ? 46000?006 ?f6l2 ?f ?0?0f? ?f? ?0? f00006 ?0?0 ?f? ? ?2 ?6 ?0 ?0f? ?6 ?0 66l2 ?2? ?6 f00006 ?0?0 ?0?

5、0 ?f? ?00?f11101226122（1012612）25. ?0?6?0? ?0?0f? ?00? ?06?0? ? 10 ?000?006 ?f0?i?f 6 ?f06?0r?000?006 12 00?006.0? f00? f0? ?0? 66l2 (?06 ?r006? ?)?2 ?00f0? ? ?0?0 ?06?2 ?a0?f12（1）59.542.559.580242.5802 =2528.7595206800 =18848.75（ ?00?0lf 000? ）（2）18848.751000 =18848750（ ?00?0lf 000?006 ） =1884.875（

6、 ?00?0lf 000? ）6.00?0? 002 ?f0?0 ?0?f6?00f ?f0006 ?0? ?f00? ?0 ?0f0(?06 ?l?)0? 002 ?0?f6?00f ?59.5?000?006 ?f0?i?f42.5?000?006 ?f06?0r?80000?006 66l2 ?1000? ?f6?0?f ? ?0 ?000f0 ? ?0?0 ?0?a0 ?000f.?0:1000? ?f6?0?f ? ?0 ?000f0 ? 1884.875 ?00?0lf 000? ?0?a0 ?000f.13 5025 + 502.52 + 252.52 = 1250 + 250

7、+ 125 =1625（ ?rialr6? ia? ）502=25（ia?）5025=1250（?rialr6? ia?）7. ?a4a?0 ?1a?i? ia? ? ?1? ?a0?漩? ?F?0?i? ?1? ?a?a?a0?漩? ?g?1? 50ia?a? ? ?a?a?ag? 2?na?T ?i?4漩0F? 2.5ia?.ia1?T ?a?0?漩? ?漩? ?4?i ?ga? ?Ga? ?0?0 ?0?agG?0 ?漩? ?aga0? ?0?0 ?la?0:? 1625?00?0?f 000? ? ?00?f.?0f?6lf ?r06?r? 0? ?06?f ?0?014 （1） 86

8、 + 832 + 632 = 48 + 48 + 36 = 132（ ?00?0?f 000? ）（2）13211.4 = 120.6（ ?rialr6? ia? ）（3）120.64 = 482.4（?L?i）8.? ?i ?Ga?a? ?0?a?ia? F?a?Ga?a? ?g?1? 8 ?ag?Fia? 6 ?a?1an?Fia? 3 ia?. F?a?a? ?a?1ai?l ? ?1?i 24 i? ?rialr6? i? i?T ia? ?rialr6? ?i?i 4 ?L?i ?ia? ?4?T ? F? ?Ga?a? ?4?ia? ?aga0? ?G ?la?a?r6?t:?Ga

9、?a? ?4?ia? ?t 482.4?L?i ?la?a?.1540cm40cm40cm40cm40cm65cm10cm?ai? ?G?i? 1?i: 40 40(65(6510)10)2 2404065652 2404040402 2 =4400 =44005200520032003200 =12800 =12800（cmcm2 2）?f? ?00000 ?60?6 3? ?al?GaG?g?g?ri?G ?a?i? ?4G? F?a? ?l? ?i? ?ai? ia? ?ga? ?G?i? F?G? ?Gal?i? ?a? ?a1a? ia? ?ga? ?G?i? . ?rl? ?G?i

10、? ?a1a? F?ai? 1?i ?a?aga0? ?la?1640cm40cm40cm40cm40cm65cm10cm?0?0 ?f?0?6 ?: (65 (6540404065) )4040 = 250 = 25040 = 10000 = 10000（cmcm2 2）?f? ?00000 ?60?6 3? ?al?GaG?g?g?ri?G ?a?i? ?4G? F?a? ?l? ?i? ?ai? ia? ?ga? ?G?i? F?G? ?Gal?i? ?a? ?a1a? ia? ?ga? ?G?i? . ?rl? ?G?i? ?a1a? F?ai? 1?i ?a?aga0? ?la?17

11、44810.?f0?a0l0 ?0?0?6?0? ? ?f?0 ?a0?0 ? 40000?06 ?f6l2 ?ff0 f?f ?0r6l2 ?06?2?Li? ?g?1? 4ia?a? ?G?漩? ?a? ?a?G? ?4?ia? ?a?1?i ?al?aG?i ? ?a?l?GaG?g?g?ri?G ?4?ia? ?na1?i ? ?l?0?f ?f00?6 ? ?00f0?0?6? ( 32 )000?006 (?f)18 ?at?T ia? ?rialr6? ia?a? ?G?漩? ?a? ?rl ?G? ?i?i? ?a?T ?Gga? ?a?l?GaG?g?g?ri?G Lla?a

12、t?T ?rl? ?a1a1漩? ?G?漩?19?i?i? ?a?T ?Gga? ?a?l?GaG?g?g?ri?G ?4?ia? ?1?i ?ga? ?alag? ?a? ?a?G? ?4?ia? ?a?1?i ?al?aGai ?i?ag? 1a? ?a? ?1aala4i?2 ?00?0?f 0000?06 ?f?0?0f0?0?6? ?ff0 ?0? ? ?f?2 ?00?0?f 0000?06 ?f?20 ?漩? ?G?漩? 3?G? ?i?i? ia? l?GaG?g?g?ri?G ?a?T F?ga? ?a?l?GaG?g?g?ri?G ?4?ia? ?1?i ?ga? ?ala

13、g? ?漩? ?a?G? ?4?ia? ?a?1?i ?al?al?aGai ?aga0? ?Gir1?ff0 ? ?f? ?ff0 ? ?f?21 ?漩? ?G?漩? 4?G? ?i?i? ia? l?GaG?g?g?ri?G ?a?T F?ga? ?a?l?GaG?g?g?ri?G ?4?ia? ?1?i ?ga? ?alag? ?漩? ?a?G? ?4?ia? ?a?1?i ?al?al?aGai ?aga0? ?Gir1?ff0 ? ?f?ff0 ? ?f?ff0 ? ?f?22?0?f ?62345?f0?0?6? ?0?f ? ? 0212?0?0?0f00?2 ?0?f ? ?

14、?f?2184246308?ff0 ? ?f?ff0 ? ?f?ff0 ? ?f?ff0 ? ?f?ff0 ? ?f?06 ?0?6a0? ?0? ?0i0?0f?2235cm4cm3cm5cm4cm3cm?al?L6漩? ?a?l?GaG?g?g?ri?G ?i?i? ?5? ? ?G?a?漩? l?GaG?g?g?ri?G ?a?T ?ga? 1a? ?a? ?1aala4i?245cm4cm3cm5cm4cm3cm?al?L6漩? ?a?l?GaG?g?g?ri?G ?i?i? ?5? ? ?G?a?漩? l?GaG?g?g?ri?G ?a?T ?ga? 1a? ?a? ?1aala4i

15、?255cm4cm3cm5cm4cm3cm?al?L6漩? ?a?l?GaG?g?g?ri?G ?i?i? ?5? ? ?G?a?漩? l?GaG?g?g?ri?G ?a?T ?ga? 1a? ?a? ?1aala4i?265cm4cm3cm5cm4cm3cm?al?L6漩? ?a?l?GaG?g?g?ri?G ?i?i? ?5? ? ?G?a?漩? l?GaG?g?g?ri?G ?a?T ?ga? 1a? ?a? ?1aala4i?275cm4cm3cm5cm4cm3cma?60? ?f0006 ? ?0?0f0?0?6? ?ff0 ? ?r0?f00f542532342?f0006 ? ?

16、 ?00f?al?L6漩? ?a?l?GaG?g?g?ri?G ?i?i? ?5? ? ?G?a?漩? l?GaG?g?g?ri?G ?a?T ?ga? 1a? ?a? ?1aala4i?288126111.a?06a0 27?00f? ?f ?0?0f0002 002 ? ?l ?f ?06? ?0?0 ? ?0? a?ia0 ?6060?6 ?l ?0f?2:1.?f0?006 ?00f ?00?f ?60 ?02 12.002 ? ?f?0?6 ?00?f ?60 ?02 63?ff0 ? ?f?0?6 ?00?f ?60 ?02 124.? ? ?f?0?6 ?00?f ?60 ?02 829?y? ?:1.?808? ?808?8? ? ?08? ?7? ?87? ?a?l?GaG?g?g?ri?G ( C )?a1?i ?4?aG? ria?漩? ?lga?.A、4 B、5 C、62. l?GaG?g?g?ri?G ?agga? ? ?a?aga0 ?i ?a?iia? ?a1?i ?aG?( B )?1?i ?4?aG? ria?漩? ?laga?.A、4 B、5 C、63.i? ?a? ?G? ?i?aia? ia? l?GaG?g?g?