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(1)15
÷14=
(2)8
-(
+6
)=
(3)31.4+15.19+20.6+32.81=
(4)9
-3
+2
-8
=
(5)44
-23
-23
+44
=
(6)(1
+2
+3
+1
)÷5=
(7)9+19+199+1999=
(8)0.9+0.99+0.999+0.111=
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| 1 |
| 13 |
(2)8
| 6 |
| 7 |
| 23 |
| 45 |
| 6 |
| 7 |
(3)31.4+15.19+20.6+32.81=
(4)9
| 5 |
| 7 |
| 4 |
| 9 |
| 4 |
| 9 |
| 2 |
| 7 |
(5)44
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 5 |
| 2 |
| 3 |
(6)(1
| 3 |
| 4 |
| 2 |
| 3 |
| 1 |
| 4 |
| 1 |
| 3 |
(7)9+19+199+1999=
(8)0.9+0.99+0.999+0.111=
| 计算下面各题.(能简便的要用简便方法计算) 800-600÷20 |
18×(537-488) | 720÷16÷5 |
| 329-186-14 | 25×37×4 | 19+199+1999+19999. |