Question

巧算：6200/(5X31) 25X(40+8)X125 17X34+22X51？

Answer 1

6200/(5X31)=200/5=40
25X(40+8)X125=25*6*1000=150000
25X40+8X125=1000+1000=2000
17X34+22X51=17X34+17X66=17*100=1700
1.
24、50
2.
20,6,6200/(5X31)
=6200/31/5
=200/5
=40
25X(40+8)X125
=25*6*（8*125）
=150*1000
=150000
17X34+22X51
=17*34+22*3*17
=（34+66）*17
=100*17
=1700
1.7300/300=24...,1,巧算：6200/(5X31) 25X(40+8)X125 17X34+22X51
1.7300/300=24……100,如果被除数和除数都除以2,那么商是（ ）,余数是（ ）
2.( )/25=3……5,如果要使商是4,那么被除数应该增加（　　）.