问题
解答题
神机妙算: 2842÷14+74×3
3.6×99+3.6
72×(
|
答案
(1)2842÷14+74×3
=2848÷7÷2+74×3,
=203+222,
=425;
(2)
÷( 8 9
-5 6
)3 4
=
×12,8 9
=10
;2 3
(3)3.6×99+3.6
=(99+1)×3.6,
=100×3.6,
=360;
(4)
÷( 3 4
×3 5
)3 8
=
×3 4
,40 9
=
;10 3
(5)
×4 5
+6 7
÷1 7 5 4
=
×4 5
+6 7
×1 7
,4 5
=(
+6 7
)×1 7
,4 5
=1×
,4 5
=
;4 5
(6)72×(
-5 9
)5 12
=72×
-72×5 9
,5 12
=40-30,
=10.