3*(9分之2+15分之2)-0.4 0.75*7分之5+7分之2/3分之4 6分之1+4-(8分之1+6分之1)
28分之15/0.3*50分之745分之32/(3分之2+5分之2)(7-0.25)/16分之9递等式计算,能简算的要简算急啊!!!!!!!!!!!!!!!!...
28分之15/0.3*50分之7
45分之32/(3分之2+5分之2)
(7-0.25)/16分之9
递等式计算,能简算的要简算
急啊!!!!!!!!!!!!!!!! 展开
45分之32/(3分之2+5分之2)
(7-0.25)/16分之9
递等式计算,能简算的要简算
急啊!!!!!!!!!!!!!!!! 展开
展开全部
3*(9分之2+15分之2)-0.4
=3x2/9+3x2/15-0.4
=2/3+2/5-0.4
=2/3+0.4-0.4
=2/3
0.75*7分之5+7分之2/3分之4
=3/4x5/7+2/7x3/4
=(5/7+2/7)x3/4
=1x3/4
=3/4
6分之1+4-(8分之1+6分之1)
=1/6+4-1/8-1/6
=4-1/8
=3又7/8
28分之15/0.3*50分之7
=15/28x7/50x10/3
=15/28x7/15
=1/4
45分之32/(3分之2+5分之2)
=32/45÷(10/15+6/15)
=32/45x15/16
=2/3
(7-0.25)/16分之9
=(7-1/4)x9/16
=7x9/16-1/4x9/16
=63/16-9/4
=63/16-36/16
=27/16
=3x2/9+3x2/15-0.4
=2/3+2/5-0.4
=2/3+0.4-0.4
=2/3
0.75*7分之5+7分之2/3分之4
=3/4x5/7+2/7x3/4
=(5/7+2/7)x3/4
=1x3/4
=3/4
6分之1+4-(8分之1+6分之1)
=1/6+4-1/8-1/6
=4-1/8
=3又7/8
28分之15/0.3*50分之7
=15/28x7/50x10/3
=15/28x7/15
=1/4
45分之32/(3分之2+5分之2)
=32/45÷(10/15+6/15)
=32/45x15/16
=2/3
(7-0.25)/16分之9
=(7-1/4)x9/16
=7x9/16-1/4x9/16
=63/16-9/4
=63/16-36/16
=27/16
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