计算(1)(-3)+(-4)-(+11)-(-9)(2)(-81)÷2 1 4 ×(- 4 9 )÷(-16
计算(1)(-3)+(-4)-(+11)-(-9)(2)(-81)÷214×(-49)÷(-16)(3)8-23÷(-4)3-18(4)-32×2-3×(-2)2(5)(...
计算(1)(-3)+(-4)-(+11)-(-9)(2)(-81)÷2 1 4 ×(- 4 9 )÷(-16)(3)8 - 2 3 ÷(-4 ) 3 - 1 8 (4)-3 2 ×2-3×(-2) 2 (5)( 1 2 - 5 9 + 5 6 - 7 12 )×(-36)
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(1)(-3)+(-4)-(+11)-(-9) =-3-4-11+9 =-18+9 =-9; (2)(-81)÷2
=-81×
=-1; (3)8 - 2 3 ÷(-4 ) 3 -
=8+8÷64-
═8+
=8; (4)-3 2 ×2-3×(-2) 2 =-9×2-3×4 =-18-12 =-30; (5)(
=-18+20-30+21 =-48+41 =-7. |
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