求解题谢谢了
2017-06-25
展开全部
355+260+140+245
=(355+245)+(260+140)
=600+400
=1000
19.92+14.4-9.92
=19.92-9.92+14.4
=10+14.4
=24.4
35X8+35X6-4X35
=35X(8+6-4)
=35X10
=350
28.93-7.46-5.54
=28.93-(7.46+5.54)
=28.93-13
=15.93
125X32X25
=125X8X4X25
=1000X100
=100000
4200÷35
=4200÷7÷5
=600÷5
=120
=(355+245)+(260+140)
=600+400
=1000
19.92+14.4-9.92
=19.92-9.92+14.4
=10+14.4
=24.4
35X8+35X6-4X35
=35X(8+6-4)
=35X10
=350
28.93-7.46-5.54
=28.93-(7.46+5.54)
=28.93-13
=15.93
125X32X25
=125X8X4X25
=1000X100
=100000
4200÷35
=4200÷7÷5
=600÷5
=120
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