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            • 1. 直接写得数.
              3.14×20=
              1
              5
              +
              1
              5
              =
              1+
              4
              7
              -
              3
              7
              =
              1
              8
              +
              3
              8
              )×24=
              0.15×100=54÷
              9
              5
              =
              12.5×8=99×0.6+0.6=
            • 2. 直接写出得数.
              2
              7
              ÷2=
              3
              5
              ×1=
              3
              4
              +
              1
              3
              =
              12÷
              3
              4
              =
              1
              10
              =
              5
              28
              ×7=
              4
              5
              ÷
              4
              7
              =
              5-
              3
              7
              =
              7
              24
              ÷1=
              4
              27
              =
            • 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.
              3÷4=
              2
              3
              +
              4
              3
              =
              18
              7
              -
              4
              7
              =
              5.4×99+5.4=
              0.84÷0.6=1.6×0.5=3.4-1.82=3.6×4÷3.6×4=
            • 6. 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%=
            • 7.
              列综合算式:    
            • 8. 直接写出得数.
              (1)
              1
              4
              +
              2
              5
              =
              (2)0.25×8=
              (3)1-0.01=
              (4)
              4
              5
              ×
              1
              3
              =
              (5)
              2
              9
              ÷
              1
              4
              =
              (6)
              4
              5
              -
              1
              3
              =
              (7)0÷3.2=
              (8)9.5+0.52=
            • 9. 快快算
              0.41×100=0.654×1000=0.6÷100=
              1.052×1000=40.5÷100=62.5×100=
              0.03÷10=7÷100=26.8÷10÷100=
            • 10. 直接写得数
              5
              6
              -
              1
              4
              =
              5
              6
              ×
              8
              15
              =
              1÷0.25=2+
              5
              4
              =
              2
              5
              ×4÷
              2
              5
              ×4
              3-
              2
              3
              =
              3.14×102=25.12÷3.14=18.84×5=(3+
              3
              5
              )÷3=
            0/40

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