题目内容
| 脱式计算. 280÷7×3 | 200+810÷9 | 350÷5+143 |
| 6×400-250 | 540÷6+10 | (43+37)×8. |
(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.
=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.
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