5.5×7.7+23×0.55简便运算?
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5.5×7.7+23×0.55
=(5.5÷10)×(7.7x10)+23×0.55
=0.55x77+23x0.55
=(77+23)x0.55
=100x0.55
=55
=(5.5÷10)×(7.7x10)+23×0.55
=0.55x77+23x0.55
=(77+23)x0.55
=100x0.55
=55
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