
计算:(1)-2+(-3)-(+1)-(-6)(2)?81÷|?214|×49÷(?16)(3)945×5?12×(14+16?12)(4)-22+[1
计算:(1)-2+(-3)-(+1)-(-6)(2)?81÷|?214|×49÷(?16)(3)945×5?12×(14+16?12)(4)-22+[12-(-3)×2]...
计算:(1)-2+(-3)-(+1)-(-6)(2)?81÷|?214|×49÷(?16)(3)945×5?12×(14+16?12)(4)-22+[12-(-3)×2]÷(-3)
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(1)-2+(-3)-(+1)-(-6)
=-2-3-1+6
=-6+6
=0;
(2)?81÷|?2
|×
÷(?16)
=81×
×
×
=1;
(3)9
×5?12×(
+
?
)
=49-(3+2-6)
=49+1
=50;
(4)-22+[12-(-3)×2]÷(-3)
=-4+[12+6]÷(-3)
=-4+18÷(-3)
=-4-6
=-10.
=-2-3-1+6
=-6+6
=0;
(2)?81÷|?2
1 |
4 |
4 |
9 |
=81×
4 |
9 |
4 |
9 |
1 |
16 |
=1;
(3)9
4 |
5 |
1 |
4 |
1 |
6 |
1 |
2 |
=49-(3+2-6)
=49+1
=50;
(4)-22+[12-(-3)×2]÷(-3)
=-4+[12+6]÷(-3)
=-4+18÷(-3)
=-4-6
=-10.
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