
计算:(1)-10+8÷(-2)2-(-4)×(-3)(2)-13-(1-0.5)×13×[2-(-3)2].
计算:(1)-10+8÷(-2)2-(-4)×(-3)(2)-13-(1-0.5)×13×[2-(-3)2]....
计算:(1)-10+8÷(-2)2-(-4)×(-3)(2)-13-(1-0.5)×13×[2-(-3)2].
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(1)-10+8÷(-2)2-(-4)×(-3)
=-10+8÷4-12
=-10+2-12
=-10+(-12)+2
=-22+2
=-20;
(2)-13-(1-0.5)×
×[2-(-3)2]
=-1-
×
×(2-9)
=-1-
×(-7)
=-1+
=
.
=-10+8÷4-12
=-10+2-12
=-10+(-12)+2
=-22+2
=-20;
(2)-13-(1-0.5)×
1 |
3 |
=-1-
1 |
2 |
1 |
3 |
=-1-
1 |
6 |
=-1+
7 |
6 |
=
1 |
6 |
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