问题
解答题
计算下面各题: (
13.6÷2-0.4×7=______; 2600-1600÷25÷4=______. |
答案
(
+1 4
)÷7 20
,3 4
=(
+1 4
)×7 20
,4 3
=
×1 4
+4 3
×7 20
,4 3
=
+1 3
,7 15
=
+5 15
,7 15
=
,12 15
=
;4 5
×9-11 18
×6,11 18
=
×(9-6),11 18
=
×3,11 18
=
;11 6
13.6÷2-0.4×7,
=6.8-0.28,
=6.52;
2600-1600÷25÷4,
=2600-1600÷(25×4),
=2600-1600÷100,
=2600-16,
=2584.