Question

急求二道小学数学简算题（高分）

题一：5÷7分之5减7分之5÷5
题二：99999x77778+33333x66666
不对啊！用笨算的方法和你的结果不一样

Answer 1

1题:5÷7分之5减7分之5÷5
=48/7
2题:99999x77778+33333x3x22222
=99999x77778+99999x22222
=99999x(77778+22222)
=99999x100000
=9999900000

Answer 2

题一：5÷7分之5减7分之5÷5
解一：5÷5/7-5/7÷5
=5x7/5-5/7x1/5
=35/5-1/7
=35x7/35-5/35
=5(49-1)/35
=48/7
题二：99999x77778+33333x66666
解二：99999x77778+33333x3x22222
=99999x77778+99999x22222
=99999x(77778+22222)
=99999x100000
=9999900000

Answer 3

1
5÷5/7-5/7÷5
=5*7/5-5/7*5/7
=6又七分之3
2
99999x77778+33333x22222
=33333X3X77778+33333+22222
=(77778+22222)*33333*3
8518448148

Answer 4

5÷5/7-5/7÷5 =7-1/7 =48/7 =6.857142857
99999*77778+99999*22222=9999900000

Answer 5

5÷5/7-5/7÷5 =7-1/7 =48/7 =6.857142857
题二9999900000