Question

4.2×3.5+5.5×0.32怎样简便运算

Answer 1

4.2×3.5+5.5×0.32
=(4+0.20)x3.5+5.5x(0.3+0.02)
=4x3.5+0.2x3.5+5.5x0.3+5.5x0.02
=14+0.7+1.65+0.11
=14.7+1.65+0.11
=16.46
祝学习进步。