29.8ᘧ࿾9.9锧29.8怎么用简便方法算?

2024-12-30 08:27:08
推荐回答(5个)
回答1:

解:29.8✖️9.9➕29.8等于( 16241/50 ),【324.82】
∵已知需求出29.8✖️9.9➕29.8等于多少
A × B + A × C = A × (B + C)
∴29.8 × 9.9 + 29.8
= 29.8 × (9.9 + 1)
= (29×10+8)/10 × 10.9
= 298/10 × (10×10+9)/10
= 149/5 × 109/10
= 16241/50
= 324.82
答:29.8✖️9.9➕29.8等于16241/50,【324.82】

回答2:

29.8×9.9+29.8

回答3:

29.8x9.9+29.8
=29.8X(9.9+1)
=29.8x10.9
=32482

回答4:

29.8×9.9+29.8
=29.8×(10-0.1)+(30-0.2)
=298+2.98+30-0.2
=328+2.78
=330.78

回答5:

29.8×9.9+29.8
=29.8×(10-0.1)+30-0.2
=298-2.98+30-0.2
=328-3+0.02-0.2
=325-0.2+0.02
=324.82