如题所述
第1个回答 2019-08-27
53、(100+3)×12
=100×12+3×12
=1200+36
=1236
54、505×2055
=(500+5)×2055
=500×2055+5×2055
=1027500+10275
=1037775
55、68×12+68×8
=68×(12+8)
=68×20
=1360追答
=100×12+3×12
=1200+36
=1236
54、505×2055
=(500+5)×2055
=500×2055+5×2055
=1027500+10275
=1037775
55、68×12+68×8
=68×(12+8)
=68×20
=1360追答
(50+5)×20
=50×20+5×20
=1000+100
=1100
第2个回答 2019-08-27
(100 +3)×12
=100x12+3x12
=1200+36
=1236
(50+ 5)×20
=50x20+5x20
=1000+100
=1100
68×12+ 68×8
=68x(12+8)
=68x20
=1360
=100x12+3x12
=1200+36
=1236
(50+ 5)×20
=50x20+5x20
=1000+100
=1100
68×12+ 68×8
=68x(12+8)
=68x20
=1360