7.45×24+0.15×0.4便计算?
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7.45×24+0.15×0.4
=(7.45×2×2)×6+0.06
=(14.9×2)×6+0.06
=29.8×6+0.06
=30×6-0.2×6+0.06
=180-1.2+0.06
=178.86
=(7.45×2×2)×6+0.06
=(14.9×2)×6+0.06
=29.8×6+0.06
=30×6-0.2×6+0.06
=180-1.2+0.06
=178.86
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原式:7.45×24+0.15×0.4
=(7.45×0.4×60)+0.15×0.4
=(7.45×60)×0.4+0.15×0.4
=447×0.4+0.15×0.4
=(447+0.15)×0.4
=447.15×0.4
=178.86
=(7.45×0.4×60)+0.15×0.4
=(7.45×60)×0.4+0.15×0.4
=447×0.4+0.15×0.4
=(447+0.15)×0.4
=447.15×0.4
=178.86
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原式=(7.5-0.05)×24+0.06
=180-1.2+0.06
=178.86.
=180-1.2+0.06
=178.86.
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