计算下列各题:(1)1-2+3=______; (2)-2×(-7)=______;(3)(-1)2-|-5|=______;(4)10÷(-5
计算下列各题:(1)1-2+3=______;(2)-2×(-7)=______;(3)(-1)2-|-5|=______;(4)10÷(-5)=______;(5)2÷...
计算下列各题:(1)1-2+3=______; (2)-2×(-7)=______;(3)(-1)2-|-5|=______;(4)10÷(-5)=______;(5)2÷(?16)=______;(6)(-3)2-3÷12=______;(7)(-2)3-32=______;(8)2a-5-3a+1=______.
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(1)1-2+3=(1+3)-2=4-2=2;
故答案为:2;
(2)-2×(-7)=14;
故答案为:14;
(3)(-1)2-|-5|=1-5=-4;
故答案为:-4;
(4)10÷(-5)=-2;
故答案为:-2;
(5)2÷(?
)=2×(-6)=-12;
故答案为:-12;
(6)(-3)2-3÷
=9-6=3;
故答案为:3;
(7)(-2)3-32=-8-9=-17;
故答案为:-17;
(8)2a-5-3a+1=2a-3a-5+1=-a-4.
故答案为:-a-4.
故答案为:2;
(2)-2×(-7)=14;
故答案为:14;
(3)(-1)2-|-5|=1-5=-4;
故答案为:-4;
(4)10÷(-5)=-2;
故答案为:-2;
(5)2÷(?
1 |
6 |
故答案为:-12;
(6)(-3)2-3÷
1 |
2 |
故答案为:3;
(7)(-2)3-32=-8-9=-17;
故答案为:-17;
(8)2a-5-3a+1=2a-3a-5+1=-a-4.
故答案为:-a-4.
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