计算,能简算的要简算.125×17×8 35×102 56×67+33×56 12.7+0.98+3.02+5.3 5.6-1.71-
计算,能简算的要简算.125×17×835×10256×67+33×5612.7+0.98+3.02+5.35.6-1.71-0.2924.52-(7.5+4.52)...
计算,能简算的要简算.125×17×8 35×102 56×67+33×56 12.7+0.98+3.02+5.3 5.6-1.71-0.29 24.52-(7.5+4.52)
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(1)125×17×8,
=125×8×17,
=1000×17,
=17000;
(2)35×102,
=35×(100+2),
=35×100+35×2,
=3500+70,
=3570;
(3)56×67+33×56,
=56×(67+33),
=56×100,
=5600;
(4)12.7+0.98+3.02+5.3,
=(12.7+5.3)+(0.98+3.02),
=18+4,
=22;
(5)5.6-1.71-0.29,
=5.6-(1.71+0.29),
=5.6-2,
=3.6;
(6)24.52-(7.5+4.52),
=24.52-7.5-4.52,
=24.52-4.52-7.5,
=20-7.5,
=12.5.
=125×8×17,
=1000×17,
=17000;
(2)35×102,
=35×(100+2),
=35×100+35×2,
=3500+70,
=3570;
(3)56×67+33×56,
=56×(67+33),
=56×100,
=5600;
(4)12.7+0.98+3.02+5.3,
=(12.7+5.3)+(0.98+3.02),
=18+4,
=22;
(5)5.6-1.71-0.29,
=5.6-(1.71+0.29),
=5.6-2,
=3.6;
(6)24.52-(7.5+4.52),
=24.52-7.5-4.52,
=24.52-4.52-7.5,
=20-7.5,
=12.5.
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