Question

四十九点五乘十三点五加五十点五乘十三减零点五乘四十九点五用简便方法算

四十九点五乘十三点五加五十点五乘十三减零点五乘四十九点五用简便方法算

Answer 1

四十九点五乘十三点五加五十点五乘十三减零点五乘四十九点五用简便方法算
49.5x13.5+50.5x13-0.5x49.5
=49.5x13.5-0.5x49.5+50.5x13
=49.5x(13.5-0.5)+50.5x13
=49.5x13+50.5x13
=13x(49.5+50.5)
=13x100
=1300

Answer 2

49.5X13.5+50.5X13.5-0.5X49,5
=13.5X(49.5+50.5)-0.5x49.5

=13.5X100-0.5X49.5
=1350-24.75
=1320.25