(-七分之二)+1-(-3)+七分之四
=(7分之4-7分之2)+1+3
=7分之2+4
=4又7分之2
(-0.5)-(-三又四分之一)+2.75-(+七又二分之一)
=-0.5+3.25+2.75+7.5
=(7.5-0.5)+(3.25+2.75)
=7+6
=13
(-七分之二)+1-(-3)+七分之四 (-0.5)-(-三又四分之一)+2.75-(+七又二分之一)
(-七分之二)+1-(-3)+七分之四 (-0.5)-(-三又四分之一)+2.75-(+七又二分之一)
数学人气:651 ℃时间:2020-04-10 06:38:37
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