题目内容
递等式计算(能简算的要简算)
①14
÷7
②4265+660÷15-36×59
③(4
-0.005×800)÷1
④266.5÷(2
×7-5
)
①14
| 7 |
| 20 |
②4265+660÷15-36×59
③(4
| 1 |
| 5 |
| 1 |
| 7 |
④266.5÷(2
| 3 |
| 14 |
| 1 |
| 4 |
①14
÷7
=14
×
=(14×
)+(
×
)
=2+
=2
;
②4265+660÷15-36×59
=4256+44-2124
=4300-2124
=2176;
③(4
-0.005×800)÷1
=(4
-4)÷1
=
×
=
;
④266.5÷(2
×7-5
)
=266.5÷(2×7+
×7-5
)
=266.5÷(15
-5
)
=266.5÷10.25(或
÷
)
=26.
| 7 |
| 20 |
=14
| 7 |
| 20 |
| 1 |
| 7 |
=(14×
| 1 |
| 7 |
| 7 |
| 20 |
| 1 |
| 7 |
=2+
| 1 |
| 20 |
=2
| 1 |
| 20 |
②4265+660÷15-36×59
=4256+44-2124
=4300-2124
=2176;
③(4
| 1 |
| 5 |
| 1 |
| 7 |
=(4
| 1 |
| 5 |
| 1 |
| 7 |
=
| 1 |
| 5 |
| 7 |
| 8 |
=
| 7 |
| 40 |
④266.5÷(2
| 3 |
| 14 |
| 1 |
| 4 |
=266.5÷(2×7+
| 3 |
| 14 |
| 1 |
| 4 |
=266.5÷(15
| 1 |
| 2 |
| 1 |
| 4 |
=266.5÷10.25(或
| 533 |
| 2 |
| 41 |
| 4 |
=26.
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