(-49)÷(2 又1/3)7/3÷(-3)
问题描述:
(-49)÷(2 又1/3)7/3÷(-3)
(-3/5)×(3又1/2)÷(-1又1/4)÷3
-22/7×(22/7-4/3)×7/22÷(-22/21)
答
(-49)÷(2 又1/3)÷(-3)
=-49×3/7×(-1/3)
=49×3/7×1/3
=21×1/3
=7
(-3/5)×(3又1/2)÷(-1又1/4)÷3
=3/5×7/2÷5/4÷3
=3/5×7/2×4/5×1/3
=14/25
-22/7×(22/7-4/3)×7/22÷(-22/21)
=-(22/7-4/3)×(-21/22)
=(22/7-4/3)×21/22
=22/7×21/22-4/3×21/22
=3-14/11
=19/11
=1又8/11