问题
解答题
|
答案
(1)280÷7×3
=40×3
=120;
(2)200+810÷9
=200+90
=290;
(3)350÷5+143
=70+143
=213;
(4)6×400-250
=2400-250
=2150;
(5)540÷6+10
=90+10
=100;
(6)(43+37)×8
=80×8
=640.
|
(1)280÷7×3
=40×3
=120;
(2)200+810÷9
=200+90
=290;
(3)350÷5+143
=70+143
=213;
(4)6×400-250
=2400-250
=2150;
(5)540÷6+10
=90+10
=100;
(6)(43+37)×8
=80×8
=640.