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(1)3 4 11 +3 3 7 +6 7 11
=3 4 11 +6 7 11 +3 3 7
=10+3 3 7
=13 3 7 ;
(2)47×2.8+52×2.8+2.8
=2.8×(47+52+1)
=2.8×100
=280;
(3)37.6-4.87-1.13
=37.6-(4.87+1.13)
=37.6-6
=31.6;
(4)31-[0.5×(6-5.7)+18]
=31-[0.5×0.3+18]
=31-18.15
=12.85;
(5)9.3÷[24×(1- 3 8 )+3.6]
=9.3÷[24×1-24× 3 8 +3.6]
=9.3÷18.6
=0.5;
(6)[( 3 2 + 8 3 )÷ 5 6 - 7 3 ]÷ 8 9
=[ 25 6 ÷ 5 6 - 7 3 ]÷ 8 9
=[ 25 6 ÷ 5 6 - 7 3 ]÷ 8 9
=[5- 7 3 ]÷ 8 9
= 8 3 ÷ 8 9
=3;
故答案为13 3 7 ;280;31.6;12.85;0.5;3.