下面各题怎样算简便就怎样算. 1 5 × 4 9 + 1 5 × 5 9 44

下面各题怎样算简便就怎样算. 1 5 × 4 9 + 1 5 × 5 9 44× 5 43 5 18 ÷ 3 4 × 9 10 .
2025-06-26 10:39:42
推荐回答(1个)
回答1:

(1)
1
5
×
4
9
+
1
5
×
5
9

=(
4
9
+
5
9
)×
1
5

=1×
1
5

=
1
5


(2)44×
5
43

=(43+1)×
5
43

=43×
5
43
+1×
5
43

=5+
5
43

=5
5
43


(3)
5
18
÷
3
4
×
9
10

=
5
18
×
4
3
×
9
10

=
1
3