题目内容
计算:
(1)(
-
-
)×105;
(2)(-1
)×(-1
)×(-1
)×(-1
);
(3)12.25×(-13.5)×(-40)×20;
(4)17.48×37+174.8×1.9+8.74×88.
(1)(
| 1 |
| 3 |
| 5 |
| 7 |
| 2 |
| 5 |
(2)(-1
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
(3)12.25×(-13.5)×(-40)×20;
(4)17.48×37+174.8×1.9+8.74×88.
(1)原式=35-75-42
=-82;
(2)原式=
×
×
×
=3;
(3)原式=(12.25×40)×(13.5×20)
=490×270
=132300;
(4)原式=17.48×37+17.48×1.9+17.48×44
=17.48×(37+19+44)
=17.48×100
=1748.
=-82;
(2)原式=
| 3 |
| 2 |
| 4 |
| 3 |
| 5 |
| 4 |
| 6 |
| 5 |
=3;
(3)原式=(12.25×40)×(13.5×20)
=490×270
=132300;
(4)原式=17.48×37+17.48×1.9+17.48×44
=17.48×(37+19+44)
=17.48×100
=1748.
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