156×173×2这题如何简便运算?
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![156×173×2这题如何简便运算?](/uploads/image/z/248341-13-1.jpg?t=156%C3%97173%C3%972%E8%BF%99%E9%A2%98%E5%A6%82%E4%BD%95%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%3F)
156×173×2这题如何简便运算?
156×173×2这题如何简便运算?
156×173×2这题如何简便运算?
156×173×2
=312*173
=(300+2)*(100+73)
=30000+200+21900+156
=30000+22256
=52256
156×173×2
=312*173
=(300+2)*(100+73)
=30000+200+21900+156
=30000+22256
=52256
156×173×2
=312*173
=(300+12)*(100+73)
=100(300+12)+73(300+12)
=30000+1200+21900+876
=35976