8.25✘1.8+12.5✘0.18如何简算?
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解:
原式=8.25×1.8+12.5×0.l8
=8.25×1.8+(1.25×10)×0.18
=8.25×1.8+1.25×10×0.l8
=8.25×1.8+1.25×(10×0.18)
=8.25×1.8+1.25×1.8
=1.8×(8.25+1.25)
=1.8×9.5
=17.1
原式=8.25×1.8+12.5×0.l8
=8.25×1.8+(1.25×10)×0.18
=8.25×1.8+1.25×10×0.l8
=8.25×1.8+1.25×(10×0.18)
=8.25×1.8+1.25×1.8
=1.8×(8.25+1.25)
=1.8×9.5
=17.1
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=8.25×1.8+12.5×0.1×1.8
=8.25×1.8+1.25×1.8
=1.8×(8.25+1.25)
=1.8×9.5
=(2-0.2)×9.5
=2×9.5-0.2×9.5
=19-1.9
=17+2-1.9
=17+0.1
=17.1
=8.25×1.8+1.25×1.8
=1.8×(8.25+1.25)
=1.8×9.5
=(2-0.2)×9.5
=2×9.5-0.2×9.5
=19-1.9
=17+2-1.9
=17+0.1
=17.1
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