54×45怎么简便运算?54×45简便运算,把算式列出来.
问题描述：
54×45怎么简便运算?
54×45简便运算,把算式列出来.
答
算55乘45···再减去45就好了··式子的话55*45-45=2430
答
54x45=6x9x9x5=2x3x9x9x5=10x81x3=241x10=2410
答
54×45=6×9×5×9=（6×5）×（9×9）=30×81=2430
答
54*45=27*2*45=27*（2*45）=27*90=2430
答
54 × 45
= 27 × 2 × 45
= 27 × 90
= 2430
答
54×45
= 54×(50-5)
= 2700 - 270
= 2430
或
54×45
= 55×45 - 45
= (50+5)(50-5) - 45
= 2500 - 25 - 45
= 2500 - 70
= 2430