Question

1.72乘以61又10分之三+73.8乘以2又五分之四

Answer 1

1.72乘以61又10分之三+73.8乘以2又五分之四
=1.72*（61+0.3）+73.8*（2+0.8）
=105.436+206.64
=312.076

Answer 2

1.72乘以61又10分之三+73.8乘以2又五分之四
=1.72×(61+3/10)+73.8×(2+4/5)
=1.72×61+1.72×3/10+73.8×2+73.8×8/10
=104.92+0.516+147.6+59.04
=312.076