10.27一0.34+1.73一2.66用简便方法计算2.39x5.3+23.9xo.45+239

10.27一0.34+1.73一2.66用简便方法计算2.39x5.3+23.9xo.45+239x0.002
2025-04-29 07:02:33
推荐回答(1个)
回答1:

10.27一0.34+1.73一2.66
=10.27+1.73-(0.34+2.66)
=12-3
=9

2.39x5.3+23.9x0.45+239
=2.39x5.3+2.39x4.5+239
=2.39x(5.3+4.5)+239
=2.39x(10-0.2)+239
=262.422