问题
解答题
|
答案
(1)777×9+111×37,
=111×63+111×37,
=111×(63+37),
=111×100,
=11100;
(2)5-
-2 3
,1 3
=5-(
+2 3
),1 3
=5-1,
=4;
(3)
+7 9
-4 11
+4 9
,7 11
=(
-7 9
)+(4 9
+4 11
),7 11
=
+1,1 3
=1
;1 3
(4)
÷3 5
×5,1 5
=
×5×5,3 5
=3×5,
=15;
(5)72÷1.2+72÷1.8,
=60+40,
=100;
(6)9+3÷7÷6×14,
=9+
×3 7
×14,1 6
=9+
×14×3 7
,1 6
=9+6×
,1 6
=9+1,
=10;
(7)
+2 7
+2 5
+3 7
,3 5
=(
+2 7
)+(3 7
+2 5
),3 5
=
+1,5 7
=1
;5 7
(8)8.4×13-3×8.4,
=8.4×(13-3),
=8.4×10,
=84;
(9)60×(1-
-1 3
),1 2
=60×1-60×
-60×1 3
,1 2
=60-20-30,
=40-30,
=10;
(10)
×996,994 995
=
×(995+1),994 995
=
×995+994 995
×1,994 995
=994+
,994 995
=994
;994 995
故答案为:11100,4,1
,15,100,10,11 3
,84,10,9945 7
.994 995