题目内容
脱式计算.
| 300+180÷5×12 | 600÷(30-10)+5 | 490÷[210÷(360÷12)] |
| 120÷24-20÷4 | 768÷[8×(76-68)] | 130×[(600-235)÷73]. |
(1)300+180÷5×12
=300+36×12
=300+432
=732;
(2)600÷(30-10)+5
=600÷20+5
=30+5
=35;
(3)490÷[210÷(360÷12)]
=490÷[210÷30]
=490÷7
=70;
(4)120÷24-20÷4
=5-5
=0;
(5)768÷[8×(76-68)]
=768÷[8×8]
=768÷64
=12;
(6)130×[(600-235)÷73]
=130×[365÷73]
=130×5
=650.
=300+36×12
=300+432
=732;
(2)600÷(30-10)+5
=600÷20+5
=30+5
=35;
(3)490÷[210÷(360÷12)]
=490÷[210÷30]
=490÷7
=70;
(4)120÷24-20÷4
=5-5
=0;
(5)768÷[8×(76-68)]
=768÷[8×8]
=768÷64
=12;
(6)130×[(600-235)÷73]
=130×[365÷73]
=130×5
=650.
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