Question

简便计算44.4＊57.8+45.3＊55.6？

Answer 1

根据题意得:
44.4×57.8+45.3×55.6
=44.4×(45.3+12.5)+45.3×55.6
=44.4×45.3+44.4×12.5+45.3×55.6
=45.3×(44.4+55.6)+11.1×4×12.5
=45.3×100+11.1×50
=4530+555
=5085

Answer 2

44.4×57.8+45.3×55.6
=(40+4+0.4)×(50+8-0.2)+(40+5+0.3)×(50+6-0.4)
=2000+320-8+200+32-0.8+20+3.2-0.08+2000+240-16+250+30-2+15+1.8-0.12
=4000+560-24+450+62-2.8+35+5-0.2
=4000+560+450+62+35+5-24-2.8-0.2
=4000+560+450+62+40-24-3
=4000+600+450+62+40-27
=4000+1050+62+13
=4000+1125
=5125

Answer 3

44.4*45.3+44.4*12.5+45.3*55.6

=45.3*100+44.4*12.5
=45.3*100+5.55*100

=48.85*100

=4885

Answer 4

该式子可以变为（50-5.6）×（50+7.8）+（50-4.7）×（50+5.6）=2500-5.6×7.8+2500-4.7×5.6=5000-5.6×（7.8+4.7）=5000-5.6×12.5=5000-1.4×50=4930。

Answer 5

44.4＊57.8+45.3＊55.6
=2566.32+2518.68
=5085