问题
解答题
用递等式计算,能简算的要简算
|
答案
(1)(
+4 17
)×17×25,1 25
=(
+4 17
)×(17×25),1 25
=(
×17×25)+(4 17
×25×17),1 25
=(4×25)+(1×17),
=100+17,
=117;
(2)8.1÷[(4
-0.005×700)÷11 7
+3],2 7
=8.1÷[(4
-3.5)÷11 7
+3],2 7
=8.1÷[
÷19 14
+3],2 7
=8.1÷[
+3],1 2
=8.1÷3
,1 2
=
;81 35
(3)1234÷1234
,1234 1235
=1234÷
,1234×1235+1234 1235
=1234÷
,1234×(1235+1) 1235
=1234÷
,1234×1236 1235
=1234×
,1235 1234×1236
=
;1235 1236
(4)9999×2222+3334×3333,
=3333×6666+3334×3333,
=3333×(6666+3334),
=3333×10000,
=33330000.