
(1)12+(?712)?(?18)?32.5 (2)(14)×15÷(?214)(3)(-2)3×|-3|-(-16.5)(4)(13?112...
(1)12+(?712)?(?18)?32.5(2)(14)×15÷(?214)(3)(-2)3×|-3|-(-16.5)(4)(13?1121+314)÷(?142)(...
(1)12+(?712)?(?18)?32.5 (2)(14)×15÷(?214)(3)(-2)3×|-3|-(-16.5)(4)(13?1121+314)÷(?142)(5)-3×[(-4)2+2]-(-3)2÷(-2)
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(1)原式=12-7.5+18-32.5
=-10;
(2)原式=
×(-
)
=-
;
(3)原式=(-8)×3+16.5
=-7.5;
(4)原式=(
-
+
)×(-42)
=
×(-42)-
×(-42)+
×(-42)
=(-14)+22-9
=-1;
(5)原式=(-3)×[169+2]-9÷(-2)
=(-3)×18-9÷(-2)
=(-54)+4.5
=-49.5.
=-10;
(2)原式=
15 |
4 |
4 |
9 |
=-
5 |
3 |
(3)原式=(-8)×3+16.5
=-7.5;
(4)原式=(
1 |
3 |
11 |
21 |
3 |
14 |
=
1 |
3 |
11 |
21 |
3 |
14 |
=(-14)+22-9
=-1;
(5)原式=(-3)×[169+2]-9÷(-2)
=(-3)×18-9÷(-2)
=(-54)+4.5
=-49.5.
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