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1、分数、百分数脱式计算练习分数、百分数脱式计算练习 ) 6 1 8 1 (48) 21 10 7 5 ( 10 3 24()24() 28816 8 8 8 7 2 3 4 3 4 1 4 1 14 1 7 1 1- -(+) 4 1- -(+) 4 5 2 5 2 9 7 6 1 9 2 3 2 20 9 -2 98() 2424-2 98() 2424 8 5 4 1 15 1 7 2 9 1 9 8 (1)12 5 88 (1)12 5 88 6 5 21 12 15 7 8 3 11 5 11 3 17 8 17 8 () 3232 () 3232 8 5 4 3 25 9 56 1 1
2、4 3 13 6 7 4 12 7 9 4 16 7 16 9 5 5 2 2 - - 1 1 4 4 1 1 5 5 1 1 8 8 + + 1 1 7 7 2 2 3 31 1 1 1 4 4 2 2 4 4 1 1 7 7 15 15 5 2 8 5 4 1 4 3 8 3 7 3 3 1 7 4 3 1 ()18 ()18 2 1 3 1 6 1357 7715 21 7.57.5 33 3 3 2511 77514 52 24() 93 5 5 7 7 1 1 2 21 1 35 ( ) 55 35 ( ) 55 1 1 4 4 1 1 3 3 3 3 1 10 0 5 5 7 7
3、1 10 0 2 21 1 3 3 1 11 1 8 8 1 11 1 9 +31 9 +31 3 3 8 8 3 3 1 10 0 5 5 6 6 8 8 1 15 5 7 7 1 15 5 1 1 9 941 7 31 1 41 34 5 1 ( 12 1 +) - +) - 6 1 3 1 6 1 24 11 8 3 11 4 5 1 5 4 24 24 7 5 15 7 7 3 8 3 24 8 5 42( 42( 3 1 8 3 3 1 7 2 14 5 分数、百分数解方程练习分数、百分数解方程练习 5 = 20%= (10.7)= 0.64 5 = 20%= (10.7)= 0.6
4、4 3 1 3 1 5 1 5 4 X20%X=3.6 XX=1 X=X20%X=3.6 XX=1 X= 3 2 4 1 6 5 7 2 X- = X-X=15 20%X=30X- = X-X=15 20%X=30 4 1 2 1 8 5 6X10 XX12 X X6X10 XX12 X X 10 7 3 2 5 4 9 1 2 1 8 5 17 10 X X + + 1 1 2 2X X = = 5 50 00 0 1 1 6 6a a + + 1 1 3 3 = = 1 1 2 2 8 8. .6 65 5 + + 1 1 3 3 - - a a + + 1 1 6 6 = = 0 0 X= X=45 50%X=4X= X=45 50%X=4 7 5 14 5 9 2 X=36 X-X=20 X= 0.6X=36 X-X=20 X= 0.6 4 9 1 5 1 2 X - X =15 5 + X = 13 X-X=X - X =15 5 + X = 13 X-X= 5 5 8 8 1 1 3 315 7 25 14 37.520%69.5 X=10 X-X=20 X=37.520%69.5 X=10 X-X=20 X= 5 4 8 3 2 1 4 3