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简介:
88×29+88×171
=88×(29+171)
=88×200
=17600
312×41+88×41
=41×(312+88)
=41×400
=16400
72×137+63×72
=72×(137+72)
=72×200
=14400
134×51+166×51
=51×(134+166)
=51×300
=15300
342×76+76×58
=76×(342+58)
=76×400
=30400
77×203+97×77
=77×(203+97)
=77×300
=23100