问题
解答题
|
答案
(1)9×
+5 18
×9,13 18
=9×(
+5 18
),13 18
=9×1,
=9;
(2)
+(11 27
+5 8
)×8,2 27
=
+11 27
×8+5 8
×8,2 27
=
+11 27
+5,16 27
=1+5,
=6;
(3)(5.6-1.6÷2)×2.5,
=(5.6-0.8)×2.5,
=4.8×2.5,
=1.2×(4×2.5),
=1.2×10,
=12;
(4)(
+5 6
+7 12
)÷3 8
,1 48
=(
+5 6
+7 12
)×48,3 8
=
×48+5 6
×48+7 12
×48,3 8
=40+28+18,
=86.