0.64×25×25×7点8+2点二脱式计算

0.64×25×25×7点8+2点二脱式计算
2024-11-28 11:44:28
推荐回答(1个)
回答1:

0.64×25×25×7.8+2.2

=0.8x0.8x25×25×7.8+2.2
=0.8x25x0.8x25×7.8+2.2
=20x20x7.8+2.2
=3 120+2.2
=3122.2