55×12简便计算
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55×12简便计算
55×12
=(50+5)*12
=50*12+5*12
=600+60
=660
原式=50×12+5×12
=600+60
=660
55×10 2×55
55×12
=11*5*12
=11*(5*12)
=11*60
=660
55×12简便计算
55×12
=(50+5)*12
=50*12+5*12
=600+60
=660
原式=50×12+5×12
=600+60
=660
55×10 2×55
55×12
=11*5*12
=11*(5*12)
=11*60
=660