1、分数、百分数脱式计算练习)618(4 )21075(10324( ) 28 16 887234411471- - -( + ) 4 52976123209- 2 98( ) 2424854115729198 (1 )12 5 8 86521783153178 ( ) 3232 854329561437412916716952 -14 15 18+ 17 231 14 24 1715 584138731( )18 21363571217.5.33 25174524()9357 12135 ( ) 5 5 14 13 310 57 1021 311 811 9 + 31 38 310 56 815
2、 715 19 473151( 2+ ) - 631624183554 24 75138324542(31872145分数、百分数解方程练习 5 = 20% = ( 1 0.7) = 0.643131514X20%X=3.6 X X=1 X =32416572X- = X- X=15 20%X=30412856 X10 X X12 X X 107325491285170X+12X=500 16a+ 13= 12 8.65+13-a +16=0X = X =45 50%X=475149X=36 X- X=20 X = 0.691512X - X =15 5 + X = 13 X- X=58 13 1572437.520%69.5 X=10 X- X=20 X =54832143