8.2×4.5+4.5×1.8。
用递等式计算.8.2×4.5+4.5×1.80.35×1.25×2×0.851.8+18.9÷0.93.04÷7.6×7.536÷(1.25×16)45.8-5.8÷0....
用递等式计算. 8.2×4.5+4.5×1.8 0.35×1.25×2×0.8 51.8+18.9÷0.9 3.04÷7.6×7.5 36÷(1.25×16) 45.8-5.8÷0.5
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(1)8.2×4.5+4.5×1.8
=(8.2+1.8)×4.5
=10×4.5
=45;
(2)0.35×1.25×2×0.8
=(0.35×2)×(1.25×8)
=0.7×10
=7;
(3)51.8+18.9÷0.9
=51.8+21
=72.8;
(4)3.04÷7.6×7.5
=0.4×7.5
=3;
(5)36÷(1.25×16)
=36÷(1.25×8×2)
=36÷20
=1.8;
(6)45.8-5.8÷0.5
=45.8-11.6
=34.2.
=(8.2+1.8)×4.5
=10×4.5
=45;
(2)0.35×1.25×2×0.8
=(0.35×2)×(1.25×8)
=0.7×10
=7;
(3)51.8+18.9÷0.9
=51.8+21
=72.8;
(4)3.04÷7.6×7.5
=0.4×7.5
=3;
(5)36÷(1.25×16)
=36÷(1.25×8×2)
=36÷20
=1.8;
(6)45.8-5.8÷0.5
=45.8-11.6
=34.2.
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