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4.    先看图,再写出两道乘法算式和两道除法算式。

 

(  )×(  )=(  )   (  )÷(  )=(  )

(  )×(  )=(  )   (  )÷(  )=(  )

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3.    在下面的括号内填上“厘米”或“米”。

⑴床铺长2(    )   ⑵铅笔长20(    )

⑶课本宽12(    )   ⑷操场上的旗杆高15(     )

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2.    8个4相加,写成乘法算式是(        );用口诀是(         )

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1.    15÷5=3表示:⑴15里面有(  )个(  );⑵把(  )平均分成5份,每份是(  );⑶(  )是(  )的3倍。

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7×8×0×9+9×8=                    1+2+3+4+5+6+7+8+9=

81-9-9-9-9-9-9=                 15+15+15+15+15+15=

89+89-89+89-89=                   64-5×8-2× 8=

147+148+149+150+151+152+153=       1+2+3+4+5+6……+94+95+96+97+98+99=

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42+42÷7=      64÷8+70=      500+320+80=           60+60+60=

8÷8×8=     1300+700-1000=      30-30÷6=       165-50-50=

273+35+65=    120 + 395 + 80 =     90÷90×90=    4000-3500 + 500=

100-23-77=    165+165-165=      65-(40-25)=      28÷7×6=

800+683-600=   45+36-45=      5×8÷5=          (27+36)÷7=

650-599+250=    58+97-58=      989-231+231=      53-(48+5)=

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8×6=    72 + 19  =     6 ÷1  =    180÷180=      48÷8  =

45 + 37  =     4×7=     550-550=      500-370=    25 + 75  =

55  +88  =    3200 -700=    69+24=    350-80  =     77  +  66 =

790 +  130 =    87-29=     800-330 =     99+11=    257-257=

65 +  35  =     69  ÷ 8  =    92  + 46 =  46÷7  =    50÷6=

0 ÷ 8  =    39  ÷  9  =     93-39  =   86-68=      1000-300=

29+63=     54-45  =      7 ×7 =    75  ÷ 9   =     81÷9  =

800-260=     86×0=     470-80 =     55÷7  =     38 +  52  =

250+630=    77 +  33  =    380+70=    500-490=       66÷7  =

6 ÷ 6 =      95-68=    0  ×9  =     27÷9=       910-320=

73  + 37 =     0  ÷ 9 =   680+220=   550+260=        25÷4=

0  + 9 =      57-38=    8  ×  9  =     47÷8=     126-126=

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18+9 – 9 =    12 – 8 + 70 =    70 – 30 + 6 =    46 + 40 + 2 = 

99 – 9 – 40 =   5 + 70 – 5 =     9 + 7 + 20 =    14 – 5 + 30 = 

30 + 6 + 4 =   55 – 5 + 15 =    36 +30 +20=    5 + 5 5 +20= 

13 – 5 + 50=   82 – 80 +8=    

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  3 +(  )=73      5 +(  )=70       4 +(  )=17 

  43 +(  )=93      38 –(  )=8       68 –(  )=48  

 (  )– 6 = 50      (  )+ 20 = 66      48 =(  )+20

  63=(  )+13      72=(  )+ 70       59=(  )+ 9

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28 + 20 =    58 – 6 =     66 – 60 =    75 – 30 =   38 + 40 =  

 71 + 23 =   89 – 8 =     50 + 24 =    4 + 55 =   96 – 20 =   66 – 60 =   38 + 21 =    30 + 34 =     69 – 7 =    59 – 4 = 

 73 – 70 =    95 – 50 =    25 + 44 =    62 + 7 =    30 + 49 =   86 – 60 =   91 – 50 =     36 + 30 =    51 + 25 =

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