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            • 1. 直接写出得数
              150×4=70×8=300+250=88-55=
              1
              3
              +
              2
              3
              =
              4
              7
              +
              1
              7
              =
              5
              7
              -
              5
              7
              =
              3
              4
              -
              1
              4
              =
              320÷4=200×50=4800÷8=560÷8=
            • 2. 计算.
              4
              5
              -
              3
              10
              +
              2
              3
                         
              5-
              9
              16
              -
              7
              16
                        
              5
              12
              +
              3
              7
              +
              4
              7
              +
              7
              12
                         
              5
              6
              -(
              1
              2
              -
              1
              3
              6
              7
              +
              2
              15
              +
              1
              7
              +
              13
              15
                             
              19
              21
              +
              5
              7
              -
              3
              14
                               
              2
              3
              +
              5
              9
              -
              2
              3
              +
              5
              9
            • 3. 直接写出得数
              24×20=50×20=7.6-3.4=424÷4=1-0.8=
              8+4.2=
              1
              5
              +
              2
              5
              =
              1-
              3
              4
              =
              7
              8
              -
              7
              8
              =
              1
              2
              +
              1
              2
              =
            • 4. 计算.
              3
              20
              ÷6=
              7
              10
              ×4=
              3
              5
              ÷10=
              3
              4
              =
              3
              5
              ÷
              4
              5
              =
              1
              3
              +
              1
              2
              =
              2
              3
              =
              4
              7
              ÷
              7
              4
              =
            • 5.
              3
              8
              再加上(  )个这样的分数单位是1.
              A.5
              B.13
              C.8
            • 6. 怎样算简便就怎样算
              1
              3
              +
              4
              7
              +
              2
              3
              +
              1
              7
              ;             8-
              4
              9
              -
              5
              9
              ;            
              23
              25
              -
              3
              8
              +
              2
              25
              -
              5
              8
            • 7. 你能算得又对又快吗?
              4
              8
              +
              3
              8
              =
              6
              9
              -
              1
              9
              =
              3
              5
              -
              2
              5
              =
              1-
              1
              4
              =
              5
              10
              -
              4
              10
              =
              2
              7
              -
              1
              7
              =
              1
              6
              +
              1
              6
              =
              1-
              9
              10
              =
              1
              2
              +
              1
              2
              =
              2
              3
              -
              1
              3
              =
            • 8. 计算.
              4
              5
              -
              3
              8
              -
              1
              4

              1-
              1
              14
              -
              2
              7

              8
              9
              -(
              1
              3
              -
              1
              9
            • 9. 算一算
              3
              8
              +
              1
              8
              =
              3
              7
              -
              1
              7
              =
              4
              9
              +
              2
              9
              =
              1-
              3
              8
              =
              3
              7
              +
              4
              7
              =
              3
              5
              -
              1
              5
              =
            • 10.
              直接写出得数
              20×
              4
              5
              =

              3-0.73=

              2
              3
              ÷2=

              122=
              3
              4
              ÷
              3
              5
              =
              1
              3
              +
              2
              9
              =
              52-42=
              5
              8
              -
              3
              8
              =
              3π-5π=152=0.35÷0.7=
            0/40

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