神机“妙算”:2.37×6.3+2.37×3.7 2.5×1.25×0....
神机“妙算”:2.37×6.3+2.37×3.72.5×1.25×0.323.8×10.12.4×0.8-4.48÷2.812.6÷[(8.06÷2-3.13)×1.4]...
神机“妙算”:2.37×6.3+2.37×3.7 2.5×1.25×0.32 3.8×10.12.4×0.8-4.48÷2.8 12.6÷[(8.06÷2-3.13)×1.4].
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(1)2.37×6.3+2.37×3.7
=2.37×(6.3+3.7)
=2.37×10
=23.7;
(2)2.5×1.25×0.32
=2.5×1.25×0.8×0.4
=(2.5×0.4)×(1.25×0.8)
=1×1
=1;
(3)3.8×10.1
=3.8×(10+0.1)
=3.8×10+3.8×0.1
=38+0.38
=38.38;
(4)2.4×0.8-4.48÷2.8
=1.92-1.6
=0.32;
(5)12.6÷[(8.06÷2-3.13)×1.4]
=12.6÷[(4.03-3.13)×1.4]
=12.6÷[0.9×1.4]
=12.6÷1.26
=10.
=2.37×(6.3+3.7)
=2.37×10
=23.7;
(2)2.5×1.25×0.32
=2.5×1.25×0.8×0.4
=(2.5×0.4)×(1.25×0.8)
=1×1
=1;
(3)3.8×10.1
=3.8×(10+0.1)
=3.8×10+3.8×0.1
=38+0.38
=38.38;
(4)2.4×0.8-4.48÷2.8
=1.92-1.6
=0.32;
(5)12.6÷[(8.06÷2-3.13)×1.4]
=12.6÷[(4.03-3.13)×1.4]
=12.6÷[0.9×1.4]
=12.6÷1.26
=10.
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