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1.ݿھ˾ʮ,д˷ʽֱ( )( )
2.һ7,һ9,( ) 3.8+8+8+8+8+8+8=8( ) 94+9=( )9 4. 87( );( )94 ѿھ
( ) ( )ʮһ ( )ʮ Ϻʵ
5( )=35 ( )9=54 6( )=48 ( )9=63 5( )=40 ( )9=63 ġһ㡣
85= 76= 68= 67+7= 93= 77= 99= 83+8= 89= 48= 49= 76-7= 88= 95= 78= 89-9= 塢36+4229
ϡ><= 89 7744
48 18-9
79 37
33 57
78
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߶ڵij߶ٵ4 ߶:
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1.(2)ͬѧֳ5ӥСϷ,ÿ7ͬѧ,(2)жͬѧ?
2.Сǿ9ֻֽ,С۵Сǿ3,С˶ֻֽ? 3.
(1)һµļǮһǦʺе9,һ¶Ԫ?
(2)7Ǧʺкһ绰,һҪԪ?
4.18֮ľǶ?
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һ1.89=72 98=72 2. 63 3. 7 5 4. 56 36
ʮ () ʮ ʮ (ľ) 7 6 8 7 8 2
ġ40 42 48 49 27 49 81 32 72 32 36 35 64 45 56 63 塢> > = > < >
1. 94=36()49=36() 2. 83=24()38=24() ߡʾ:1.8
2.4cm߶
ˡ1.57=35() 2. 93=27(ֻ) 3. (1)89=72(Ԫ) (2)78+32=88(Ԫ)
4. 8-1=7() 57=35()