递等式计算:(能用简便方法计算的要用简便方法计算)0.11×1.8+8.2×0.110.8×(3.2-2.99÷2.3)3.5-3.5
递等式计算:(能用简便方法计算的要用简便方法计算)0.11×1.8+8.2×0.110.8×(3.2-2.99÷2.3)3.5-3.5×0.9812.5×2.5×3.2(...
递等式计算:(能用简便方法计算的要用简便方法计算)0.11×1.8+8.2×0.110.8×(3.2-2.99÷2.3)3.5-3.5×0.9812.5×2.5×3.2(8.1-5.4)÷3.6+85.7.
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(1)0.11×1.8+8.2×0.11,
=0.11×(1.8+8.2),
=0.11×10,
=1.1;
(2)0.8×(3.2-2.99÷2.3),
=0.8×(3.2-1.3),
=0.8×1.9,
=1.52;
(3)3.5-3.5×0.98,
=(1-0.98)×3.5,
=0.02×3.5,
=0.07;
(4)12.5×2.5×3.2,
=12.5×2.5×4×0.8,
=12.5×0.8×(2.5×4),
=10×10,
=100;
(5)(8.1-5.4)÷3.6+85.7,
=2.7÷3.6+85.7,
=0.75+85.7,
=86.45.
=0.11×(1.8+8.2),
=0.11×10,
=1.1;
(2)0.8×(3.2-2.99÷2.3),
=0.8×(3.2-1.3),
=0.8×1.9,
=1.52;
(3)3.5-3.5×0.98,
=(1-0.98)×3.5,
=0.02×3.5,
=0.07;
(4)12.5×2.5×3.2,
=12.5×2.5×4×0.8,
=12.5×0.8×(2.5×4),
=10×10,
=100;
(5)(8.1-5.4)÷3.6+85.7,
=2.7÷3.6+85.7,
=0.75+85.7,
=86.45.
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