问题
解答题
计算下面各题,能简算的必须简算.
|
答案
(1)87×3 86
=(86+1)×3 86
=86×
+1×3 86 3 86
=3+3 86
=3
;3 86
(2)
×5 6
÷1 15 7 18
=
×1 18 18 7
=
;1 7
(3)24×(
+3 8
+1 6
)5 12
=24×
+24×3 8
+24×1 6 5 12
=9+4+10
=23;
(4)
÷5+1 3
×2 3 1 5
=
×1 3
+1 5
×2 3 1 5
=(
+1 3
)×2 3 1 5
=1×1 5
=
;1 5
(5)
×0.375÷2 9 6 7
=
×2 9
÷3 8 6 7
=
÷1 12 6 7
=
;7 72
(6)(
-3 4
)×(3 16
+2 9
)1 3
=
×9 16 5 9
=
.5 16