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            • 1. 一根2米长的绳子用去
              3
              4
              米,还剩下    ;如果用去它的
              3
              4
              ,还剩下    米.
            • 2. 直接写出得数.
              113-98=0.47+0.34=0.25×4=1-0.01=
              1
              6
              +
              5
              6
              =
              1-
              3
              8
              =
              5
              9
              +
              8
              9
              =
              21
              23
              -
              17
              23
              =
              1
              8
              +
              5
              8
              =
              5
              6
              -
              1
              6
              =
              9
              14
              -
              5
              14
              =
              11
              25
              +
              9
              25
              =
            • 3. 直接写出得数:
              1
              10
              +
              3
              10
              =
              7
              9
              -
              5
              9
              =
              1
              4
              -
              1
              5
              =
              2
              3
              -
              1
              6
              =
              1-
              5
              18
              =
              7
              12
              -
              1
              6
              =
              1-
              3
              7
              -
              2
              7
              =
              1
              2
              +
              1
              3
              +
              1
              4
              =
            • 4. 直接写得数.
              5
              8
              +
              7
              8
              =
              8
              9
              +
              7
              9
              =
              5
              6
              +3
              =
              5
              12
              -
              1
              12
              =
              6
              7
              -
              3
              7
              =
              1
              3
              -
              1
              4
              =
              1-
              1
              3
              =
              1
              5
              +
              1
              6
              =
              3
              4
              -
              3
              4
              =
              5-
              9
              14
              =
            • 5. 直接写得数
              6.3+7=21.5+9.5=2.5×0.4=2-0.01=
              0.75÷0.3=3.5÷100=0.47÷0.1=12.5×1.6=
              1-
              5
              18
              =
              5
              7
              +
              8
              7
              =
            • 6.     m减少
              1
              5
              m是32m,4米增加
              1
              4
                  
            • 7. 比40米多
              1
              4
              米的是(  )
              A.50米
              B.40
              1
              4
              C.40
              1
              4
            • 8. 直接写得数.
              1
              3
              +
              1
              4
              =
              3-
              1
              3
              =
              4.6+4=10.1-1=
              4
              5
              ×4=
              25×
              3
              5
              =
              1
              4
              ×
              1
              4
              =
              3
              8
              ×
              4
              5
              =
              1
              4
              ÷
              4
              5
              =
              2
              3
              =
              8
              11
              ÷2=
              3
              5
              =
              4×20%=42%-0.42=1÷75%=1%÷10%=
            • 9. 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=
            • 10. 口算.
              8÷0.1=6÷7=21.5+9.5=
              3
              9
              +
              5
              9
              =
              7
              13
              -
              3
              13
              =
              7.8-0.08=42.8-4.28=0.6×0.5=1-
              2
              5
              =
              18÷36=
            0/40

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