Question

简便计算超急!33.28-19.24-20.59+16.7280.5+80.7+79.8+78.9+80.8

Answer 1

33.28-19.24-20.59+16.72=（33.28+16.72）-（19.24+20.59）=10

80.5+80.7+79.8+78.9+80.8=80*5+0.5+0.7-0.2-1.1+0.8=400.7