Question

17.8×11-1.78简便计算

Answer 1

17.8×11-1.78
=17.8×10+17.8×1-1.78
=178+17.8-1.78
=178+16.02
=194.02

Answer 2

17.8×11-1.78简便计算
17.8×1.1-1.78
=1.78×11-1.78
=1.78×（11-1）
=1.78×10
=17.8