脱式计算 能简算的要简算3411+337+671147×2.8+52×2.8+2.837.6-4.87-1.1331-[0.5×(6-5.7)+18]9.3÷[24×(1-38)
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脱式计算,能简算的要简算
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(1)3411+337+6711
=3411+6711+337
=10+337
=1337;
(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×(1-38)+3.6]
=9.3÷[24×1-24×38+3.6]
=9.3÷18.6
=0.5;
(6)[(32+83)÷56-73]÷89
=[256÷56-73]÷89
=[256÷56-73]÷89
=[5-73]÷89
=83÷89
=3;
故答案为1337;280;31.6;12.85;0.5;3.
