
计算:(1)-20+(-15)-(-14)-18; (2)(-20)×(-6)-(-48)÷8;(3)?216×5?216×(?4)+136×
计算:(1)-20+(-15)-(-14)-18;(2)(-20)×(-6)-(-48)÷8;(3)?216×5?216×(?4)+136×(?8);(4)-16÷(?2...
计算:(1)-20+(-15)-(-14)-18; (2)(-20)×(-6)-(-48)÷8;(3)?216×5?216×(?4)+136×(?8); (4)-16÷(?2)3?(?18)×(?4).
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(1)-20+(-15)-(-14)-18
=-20-15+14-18
=-39,
(2)(-20)×(-6)-(-48)÷8
=120+6
=126,
(3)?2
×5?2
×(?4)+
×(?8)
=?2
×(5-4+8)
=?
×9
=?
,
(4)-16÷(?2)3?(?
)×(?4)
=-16÷(-8)-
=2-
=1
.
=-20-15+14-18
=-39,
(2)(-20)×(-6)-(-48)÷8
=120+6
=126,
(3)?2
1 |
6 |
1 |
6 |
13 |
6 |
=?2
1 |
6 |
=?
13 |
6 |
=?
39 |
2 |
(4)-16÷(?2)3?(?
1 |
8 |
=-16÷(-8)-
1 |
2 |
=2-
1 |
2 |
=1
1 |
2 |
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