问题
解答题
计算下面各题,能简算的要简算.
|
答案
(1)2842÷14+74×3,
=203+222,
=425;
(2)
+4 7
-1 5
+3 7
,4 5
=(
-4 7
)+(3 7
+4 5
),1 5
=
+1,1 7
=1
;1 7
(3)5.2-11÷7-
×3,1 7
=5.2-(11×
+1 7
×3),1 7
=5.2-(11+3)×
,1 7
=5.2-14×
,1 7
=5.2-2,
=3.2;
(4)
×4÷4×3 4
,3 4
=3÷4×
,3 4
=
×3 4
,3 4
=
;9 16
(5)
÷[(6 5
-3 4
)÷2 3
],5 6
=
÷[6 5
×1 12
],6 5
=
÷6 5
,1 10
=12;
(6)1+
+1 2
+1 4
+1 8
+1 16
,1 32
=1+(
+16 32
+8 32
+4 32
+2 32
),1 32
=1+
,31 32
=1
.31 32