摘要:3780÷36+172×108-1987 ×84-100002.列式计算. (1) 一个数的18倍是720.求这个数. (2) 甲数是84.比乙数的4倍少16.乙数是多少? (3) 甲数是84.乙数是甲数的4倍少16.乙数是多少?
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怎样简便怎样算:
(1)
×
+
÷
(2)[1-(
+
)÷
(4)0.625×36+
×36-36
(4)(
+
+
+
)×
(5)
+
+
+
+
+
+
+
.
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(1)
| 5 |
| 7 |
| 2 |
| 3 |
| 2 |
| 7 |
| 3 |
| 2 |
(2)[1-(
| 3 |
| 8 |
| 1 |
| 4 |
| 1 |
| 4 |
(4)0.625×36+
| 3 |
| 8 |
(4)(
| 4 |
| 9 |
| 5 |
| 13 |
| 5 |
| 9 |
| 8 |
| 13 |
| 9 |
| 100 |
(5)
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 30 |
| 1 |
| 42 |
| 1 |
| 56 |
| 1 |
| 72 |