Question

2.8*4.6+5.6*2.7简便计算

Answer 1

原式=2.8乘以（4.6+2乘以2.7）=2.8乘以10=28

Answer 2

=2.8×2×2.3+5.6×2.7
=5.6×2.3+5.6×2.7
=5.6×（2.3+2.7）
=5.6×5
=28