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            • 1. 直接写得数
              800-798=
              1
              5
              ×
              1
              5
              =
              1÷0.5=
              3
              4
              -
              3
              4
              =
              1
              1
              4
              -
              1
              4
              ÷
              1
              4
              =
              11.7+2=0.25÷
              1
              4
              =
              2a+6a=0.12=560÷8×7=
            • 2. 直接写出得数.
              1
              5
              ×
              1
              4
              =
              1.5×
              3
              5
              =
              6
              7
              ÷3=
              5
              8
              ÷2=
              2
              5
              ÷
              4
              15
              =
              1
              4
              ÷0.25=
              5
              8
              ×
              3
              5
              =
              3
              4
              =
              4
              5
              ×
              5
              6
              =
              1
              4
              -
              1
              5
              =
              3
              4
              +
              1
              8
              =
              1÷10%=
              0.4÷
              1
              3
              =
              0.8×
              1
              2
              =
              1
              3
              ÷0.6=
              5
              7
              ×0.2=
            • 3. 直接写出答案
              17×6=200÷5=2.5×0.4=48÷8×3=0÷3=
              2.3+1.6=
              2
              3
              ×
              3
              8
              =
              1-
              2
              3
              =
              7
              10
              ÷14=
              8
              9
              =
            • 4. 40吨的
              2
              5
                  吨,比40吨少
              2
              5
                  吨.
            • 5. 口算
              3
              4
              +
              1
              4
              =
              7.4-3.8=7.4×0.01=27+68=
              2
              3
              ×0.75=
              0.125×8=12.6÷0.3=0.32=
              1
              2
              -
              1
              2
              =
              8÷(1÷
              3
              8
              )=
            • 6. 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
              =
            • 7. 直接写出得数.
              1
              3
              ÷3=
              1.7×4=8×12.5%=2-
              4
              7
              =
              4
              9
              ÷
              2
              3
              =
              5
              4
              ×36=
              1
              2
              +
              1
              8
              =
              3
              4
              +
              1
              4
              ×0=
              0.68+2.9+0.32=
            • 8. 直接写得数
              2.2+3.57=
              3
              4
              ×12=
              1
              9
              +
              2
              3
              =
              500÷125÷8=3.37+5.63=
              5
              8
              ÷
              2
              3
              =
              3.25×4=0.9×(99+0.9)=
              5
              4
              ×8+8×
              1
              4
              =
              3
              4
              ÷3×
              3
              4
              ÷3=
            • 9. 直接写出得数.
              0.875÷
              3
              8
              =
              7.2×
              4
              9
              =
              2
              3
              3
              4
              =
              25.6+0.44=
              4
              7
              +
              1
              5
              -
              4
              7
              +
              1
              5
              =
              5÷20%=
              2
              3
              +
              1
              2
              -
              3
              4
              )×12=
              2.5×18×4=
              50÷2.5÷4=9.8-2.71-3.29=
              2
              5
              ×
              1
              4
              ÷
              2
              5
              ×
              1
              4
              =
              2
              3
              ×
              4
              5
              ÷1
              1
              3
              =
            • 10. 直接写出得数.
              10÷15=0.6÷0.2=0.018÷0.02=270÷2.5÷4=
              998+1012=1.09-0.9=0.035×200=1.25×8-0.25×4=
              1
              2
              +
              1
              3
              =
              5
              7
              -
              5
              7
              ×0=
              5
              6
              ×
              2
              5
              =
              35
              18
              ×
              27
              19
              ×
              9
              7
              ×
              19
              27
              =
            0/40

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