Luyen on he lop 1

LuyÖn tËp

1.TÝnh:

  23                     40                     6                      64                     33

 +                      +                     +                        +                       +

   51                     19                   72                      24                       3

 

..........    ..........             ..........               ..........             ..........

 

2. TÝnh nhÈm

60 + 20 + 10 =                     40 + 10 + 20 =                  30 + 20 + 20 =

30 + 30         =                     40 + 30         =                   30 + 40         =

 

3. §Æt tÝnh råi tÝnh tæng, biÕt c¸c sè h¹ng lµ

     34 vµ 42                                   40 vµ 24                               8 vµ 31

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     .................                               ...................                        ..................

 

4. MÑ nu«i 22 con gµ vµ 10 con vÞt. Hái mÑ nu«i tÊt c¶ bao nhiªu gµ  vµ vÞt

Bµi gi¶i

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5. §iÒn ch÷ sè thÝch hîp vµo chç chÊm:

      2 5                       ....4                       6....                             5....

   +                          +                          +                                  +

      3....                      3 2                         2 4                              ....6

 

      5 6                       6 6                       .....4                              7  8

 

6. H×nh bªn cã bao nhiªu h×nh tam gi¸c? Bao nhiªu h×nh tø gi¸c?

 

 

 

 

 

 

 

 

 

LuyÖn tËp

1.TÝnh nhÈm:

     a) 80 – 20 – 10 =                    b) 70 – 30 – 20 =               c) 90 – 20 – 20 =

         80 – 30         =                         70 – 50        =                    90 – 40        =

2. §Æt tÝnh råi tÝnh hiÖu, biÕt sè bÞ trõ vµ sè trõ lÇn l­ît lµ:

      67 vµ 25                                  99 vµ 68                              44 vµ 14

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3. Mét sîi d©y ph¬i dµi 38dm. Mét con kiÕn bß tõ ®Çu cña sîi d©y vµ ®· bß ®­îc 26 dm. Hái con kiÕn ph¶i bß bao nhiªu ®Ò – xi – mÐt ®Ó ®Õn bªn kia  cña sîi d©y?

Bµi gi¶i

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4. Khoanh vµo ch÷ ®Æt tr­íc kÕt qu¶ ®óng:

   44 – 4 = ?

A. 4

B. 48

C. 40

D. 84

 

5. H×nh vÏ sau cã bao nhiªu h×nh tam gi¸c? Bao nhiªu h×nh tø gi¸c?

 

 

 

 

 

 

 

 

 

 

 

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LuyÖn tËp chung

 

1.ViÕt c¸c sè:

a)     Tõ 90 ®Õn 100: .............................................................................................

b)    Trßn chôc vµ bÐ h¬n 70: ..............................................................................

2. Sè?

a) Sè liÒn sau cña 79 lµ....                     d) Sè liÒn tr­íc cña 11 lµ .....

b) Sè liÒn tr­íc cña 90 lµ .....                              e) Sè lín h¬n 25 vµ bÐ h¬n 27 lµ .....

c) Sè liÒn sau cña sè 99 lµ.....                 g) Sè lín h¬n 42 vµ bÐ h¬n 45 lµ .....

3. §Æt tÝnh råi tÝnh

        42 + 24                       86 -  32                   32 + 57            99 – 18

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4. MÑ h¸i ®­îc 32 qu¶ cam, chÞ h¸i ®­îc 35 qu¶ cam. Hái c¶ chÞ vµ mÑ h¸i ®­îc bao nhiªu qu¶ cam?

5. MÑ vµ chÞ h¸i ®­îc 48 qu¶ cam, riªng mÑ h¸i ®­îc 22 qu¶ cam. Hái chÞ h¸i ®­îc bao nhiªu qu¶ cam?

6. H×nh vÏ sau cã bao nhiªu h×nh tam gi¸c?

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