题目内容
计算下列各题.
①36×202-72
②608×99+608
③75×60%+24×
+0.6
④[4
+(2.2-1
)×
]÷4.5
⑤14.85-1.58×8+31.2÷1.2.
①36×202-72
②608×99+608
③75×60%+24×
| 3 |
| 5 |
④[4
| 1 |
| 3 |
| 7 |
| 15 |
| 5 |
| 22 |
⑤14.85-1.58×8+31.2÷1.2.
①36×202-72,
=36×202-36×2,
=(202-2)×36,
=200×36,
=7200;
②608×99+608,
=608×(99+1),
=608×100,
=60800;
③75×60%+24×
+0.6,
=75×0.6+24×0.6+0.6,
=(75+24+1)×0.6,
=100×0.6,
=60;
④[4
+(2.2-1
)×
]÷4.5,
=[4
+(2
-1
)×
]÷4
,
=[4
+
×
]÷4
,
=[4
+
]×
,
=
×
,
=1;
⑤14.85-1.58×8+31.2÷1.2,
=14.85-12.64+26,
=2.21+26,
=28.21.
=36×202-36×2,
=(202-2)×36,
=200×36,
=7200;
②608×99+608,
=608×(99+1),
=608×100,
=60800;
③75×60%+24×
| 3 |
| 5 |
=75×0.6+24×0.6+0.6,
=(75+24+1)×0.6,
=100×0.6,
=60;
④[4
| 1 |
| 3 |
| 7 |
| 15 |
| 5 |
| 22 |
=[4
| 1 |
| 3 |
| 1 |
| 5 |
| 7 |
| 15 |
| 5 |
| 22 |
| 1 |
| 2 |
=[4
| 1 |
| 3 |
| 11 |
| 15 |
| 5 |
| 22 |
| 1 |
| 2 |
=[4
| 1 |
| 3 |
| 1 |
| 6 |
| 2 |
| 9 |
=
| 27 |
| 6 |
| 2 |
| 9 |
=1;
⑤14.85-1.58×8+31.2÷1.2,
=14.85-12.64+26,
=2.21+26,
=28.21.
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