Question

问: 5.3×7.3＋0.52×27的减便运算

Answer 1

解: 5.3×7.3＋0.52×27

=5.3×7.3＋5.2×2.7

=5.3×7.3＋(5.3-0.1)×2.7

=5.3*(7.3+2.7)-0.27

=5.3*10-0.27

=53-0.27

=52.73

Answer 2

解：5.3×7.3＋0.52×27
=5.2×7.3+0.1x7.3＋0.52×27
=0.52x10x7.3+0.73+0.52x27
=0.52x(73+27)+0.73
=0.52x100+0.73
=52+0.73
=52.73