计算 (1)26-17+(-5)-33(2) - 2 3 ÷ 4 9 × (- 3 2 ) 2 (3) 18-6÷(-2
计算(1)26-17+(-5)-33(2)-23÷49×(-32)2(3)18-6÷(-2)×(-13)(4)(-3)2×[23+(-59)]....
计算 (1)26-17+(-5)-33(2) - 2 3 ÷ 4 9 × (- 3 2 ) 2 (3) 18-6÷(-2)×(- 1 3 ) (4) (-3) 2 ×[ 2 3 +(- 5 9 )] .
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(1)26-17+(-5)-33 =26+(-17)+(-5)+(-33) =26+[(-17)+(-5)+(-33)] =26+(-55) =-29; (2) - 2 3 ÷
=-8÷
=-8×
=-
(3) 18-6÷(-2)×(-
=18-6×(-
=18-6×
=18-1 =17; (4) (-3) 2 ×[
=9×[
=9×
=6+(-5) =1. |
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