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            • 1. 直接写出得数
              25×24=4.2÷0.2=
              1
              4
              ×
              2
              5
              =
              12-11
              7
              9
              =
              1-20%=1÷0.2=4×5%=
              5
              8
              ×
              2
              5
              =
              12-
              5
              9
              -
              4
              9
              =
              0.32×
              1
              4
              =
            • 2. 直接写得数.
              3
              4
              =
              6-1
              1
              4
              =
              7
              12
              ×
              3
              14
              =
              9
              7
              =
              3
              5
              ×15=
              42×
              1
              14
              =
              4
              9
              ×
              1
              3
              =
              1
              5
              ÷4=
              9-
              4
              5
              ×5=
              1
              4
              +
              3
              4
              ×
              1
              3
              =
              7
              8
              ×9+
              1
              8
              =
              3
              4
              +
              1
              2
              )×3=
            • 3. 口算
              18+48=70-21         20.9+1=17-0.1=1.3×0.4=
              0.72÷9=
              1
              9
              +
              5
              9
              =
              5
              6
              -
              1
              6
              =
              2
              15
              ×
              5
              6
              =
              3
              5
              ÷
              1
              2
              =
            • 4. 直接写出得数
              18×
              2
              3
              =
              9
              10
              ×
              2
              3
              =
              7
              8
              =
              5
              7
              ×21=
              6
              7
              ÷3=
              28÷
              7
              8
              =
              1
              6
              =
              8
              9
              ÷
              9
              8
              =
            • 5. 直接写得数
              18÷
              6
              7
              =
              5
              7
              10
              21
              =
              20.4-0.526=24×(
              2
              3
              -
              1
              4
              )=
              (0.18+0.9)÷9=
              2
              15
              +
              5
              6
              =
              4
              21
              ×
              7
              16
              =
              1.25×0.16×8=
              3
              10
              ×0×40%=
              2
              5
              ×20×75%=
            • 6. 一堆煤,每天用去总量的
              2
              9
              ,4天用去总量的    
            • 7. 直接写出结果
              39×
              1
              13
              =
              0.125×32=3.2÷0.01=
              1
              7
              +
              2
              5
              +
              3
              5
              =
              a-
              1
              3
              3
              4
              =
              1
              9
              -
              1
              9
              ×0=
            • 8. 直接写出得数.
              1.2÷2.4=
              4
              5
              +
              1
              3
              =
              9.34+6.6=0.24×500=
              5×0.22=
              5
              12
              =
              376-298=5-
              7
              8
              =
              2
              5
              ×40%=
              1
              3
              -
              1
              3
              ÷3=
            • 9. 直接写得数
              1
              3
              -
              1
              4
              =
              2
              5
              +
              3
              10
              =
              2
              3
              =
              2-
              4
              5
              =
              5
              8
              ×
              2
              5
              =
              1
              20
              ×
              5
              7
              =
              8
              7
              ×
              7
              16
              =
              1
              9
              +
              5
              6
              +
              8
              9
              =
            • 10. 计算,直接写得数
              3
              10
              ×
              4
              9
              =
              5
              54
              ×9=
              9
              8
              ×
              4
              3
              =
              1
              14
              ×70=
              1
              7
              -
              1
              8
              =
              5
              16
              ×
              8
              9
              =
              1
              2
              ×
              4
              3
              =
              5
              16
              ×10=
              5
              21
              ×
              7
              15
              =
              1
              4
              ×
              1
              3
              =
              3
              10
              ×
              5
              4
              =
              2
              3
              =
              6
              51
              ×10=
              2
              7
              ×
              1
              9
              =
              140×
              3
              7
              =
              1
              3
              +
              1
              6
              =
              5
              7
              ×
              4
              15
              =
              20×
              4
              5
              =
              75×
              2
              3
              =
              9
              10
              ×25=
            0/40

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