如题所述
第1个回答 2021-01-03
25×54+24×46
=25×54+(25-1)×46
=25×54+25×46-1×46
=(54+46)×25-46
=100×25-46
=2500-46
=2454
=25×54+(25-1)×46
=25×54+25×46-1×46
=(54+46)×25-46
=100×25-46
=2500-46
=2454
第2个回答 2021-01-03
25x54+24x46
=(24+1)x54+24x46
=24x54+1x54+24x46
=24x(54+46)+54
=24x100+54
=2400+54
=2454
=(24+1)x54+24x46
=24x54+1x54+24x46
=24x(54+46)+54
=24x100+54
=2400+54
=2454