问题
解答题
简算: ①
②18.76-3.47-0.53; ③36×99. |
答案
①
÷9+5 12
×1 9 7 12
=
×5 12
+1 9
×1 9
,7 12
=(
+5 12
)×7 12
,1 9
=1×
,1 9
=
;1 9
②18.76-3.47-0.53
=18.76-(3.47+0.53),
=18.76-4,
=14.76;
③36×99
=36×(100-1),
=36×100-36,
=3600-36,
=3564.