19/15+11/15×3/5简算?
2个回答
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解:l9/l5十ll/l5×3/5
=l0/雹运15十9/l5十ll/l5×9/l5
=10/l5十9/余肆尘l5 ×(l十ll/l5)
=10/l5十9/l5×l6/l5
=10/l5十l44/225
=l50/225十l44/225
=294/225
=竖禅1又69/225
=1又23/75
=l0/雹运15十9/l5十ll/l5×9/l5
=10/l5十9/余肆尘l5 ×(l十ll/l5)
=10/l5十9/l5×l6/l5
=10/l5十l44/225
=l50/225十l44/225
=294/225
=竖禅1又69/225
=1又23/75
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