问题
解答题
|
答案
(1)
×3 8
+11 14
×3 14 3 8
=(
+11 14
)×3 14 3 8
=1×3 8
=
;3 8
(2)
+4 9
+3 11
+5 9 1 11
=(
+4 9
)+(5 9
+3 11
)1 11
=1+4 11
=1
;4 11
(3)
×5 7
×14 15
=10 21
;20 63
(4)101×
-3 8 3 8
=(101-1)×3 8
=100×3 8
=
;75 2
(5)
×525 51
=
×(51+1)5 51
=
×51+5 51 5 51
=5+5 51
=5
;5 51
(6)
×51×9×2 9 12 17
=(
×9)×(51×2 9
)12 17
=2×36
=72.