数学—简便计算(送分)7.9×6.74-(7.43-0.69)×7.9送分......

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数学—简便计算(送分)7.9×6.74-(7.43-0.69)×7.9送分......

数学—简便计算(送分)7.9×6.74-(7.43-0.69)×7.9送分......
数学—简便计算(送分)
7.9×6.74-(7.43-0.69)×7.9
送分......

数学—简便计算(送分)7.9×6.74-(7.43-0.69)×7.9送分......
7.9×6.74-(7.43-0.69)×7.9
=7.9×(6.74-7.43+0.69)
=7.9×0
=0

7.9×6.74-(7.43-0.69)×7.9
=7.9×(6.74-7.43+0.69)×7.9
=7.9×0×7.9
=0

7.9×6.74-(7.43-0.69)×7.9
=7.9×[6.74-(7.43-0.69)]
=7.9×0
=0

7.9×6.74-(7.43-0.69)×7.9
=7.9×(6.74-7.43+0.69)×7.9
=7.9×0×7.9
=0