计算:(1)|-2|-(-2.5)-|1-4|(2)2×(-3) 2 -3 3 -6÷(-2)(3)[ 25 24 - ( 3
计算:(1)|-2|-(-2.5)-|1-4|(2)2×(-3)2-33-6÷(-2)(3)[2524-(38+16-34)×24]÷5(4)291213×(-26)....
计算:(1)|-2|-(-2.5)-|1-4|(2)2×(-3) 2 -3 3 -6÷(-2)(3)[ 25 24 - ( 3 8 + 1 6 - 3 4 )×24]÷5 (4) 29 12 13 ×(-26) .
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(1)|-2|-(-2.5)-|1-4| =2+2.5-3 =1.5; (2)2×(-3) 2 -3 3 -6÷(-2) =2×9-27+3 =18-27+3 =-6; (3)[
=[
=[
=
=1
(4) 29
=(30-
=-30×26+
=-780+2 =-778. |
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