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幼苗
共回答了17个问题采纳率:88.2% 举报
(1)
44
5 +
21
4 +
6
5 +
11
4 ,
=(
44
5 +
6
5 )+(
21
4 +
11
4 ),
=10+8,
=18;
(2)
23
4 ×
3
7 +
27
4 ×
3
7 ,
=(
23
4 +
27
4 )×
3
7 ,
=
25
2 ×
3
7 ,
=
75
14 ;
(3)4.3×11.8+86×0.91,
=43×1.18+43×1.82,
=43×(1.18+1.82),
=43×3,
=129;
(4)7.46×36+74.6×6.4,
=74.6×3.6+74.6×6.4,
=74.6×(3.6+6.4),
=74.6×10,
=746.
1年前
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