99x22+88x33+77x44+66x55用简便计算怎么算

2024-12-16 00:12:29
推荐回答(1个)
回答1:

99x22+88x33+77x44+66x55 =11×﹙9×2+8×3+7×4+6×5﹚
=11×﹙18+24+28+30﹚
=11×100
=1100