1、1解方程、简便运算强化训练解方程、简便运算强化训练一、解方程。3X=X=X=8372167125310=30%X=X-0.25=4X53722541X=20 50%X+X=3.6 25%X+15%X=53415454X-15%X=68 X X=XX121 274383 XX=X+X=4 X+X=208743216141 6X5=13.4 4 X638 X+=43418324 X3 9=29 5X3 4X6=221575320.365-X=X-0.8 X=16+6 (X-4.5)=7 343523X12 2(X-2.6)=8 X-X=32412513310X(+)=X0.375 X=20 X 8
2、.5=1.5 1638131265 X-X-4=21 4+0.7X=102 X-25%X=1045123二、简便运算。(-)60 36 0.65101712153435(1.25-0.125)8 25 8 24(-)381211836131(12+)7 1310.2 2.69972+27.53.7-7.53.7 +47613376139751197115101-99+-710710353551613753713103-2-0.921.410.928.59 2572572572.254.8+77.50.48 4.87.8+780.52 1.311.61.61.34(15)4.3612.58 2.
3、5321.2522727282151.250.8 9.63.23 15.20.254 32 33 146.5-(23+46.5)89898989838312.89-(3.89-1.6)73.8-1.64-13.8-5.36 15.75+3.59-0.59+14.255.48-(9.4-0.52)12.065.072.94 30.349.7610.34 二、简便运算。(712-15)60 363435 0.651015(1.25-0.125)8 2538 8 24(-)(12+)7 1310.2 2.699 X-45 X-4=21 47 613+37 613 27.53.7-7.53.7 0.9
4、21.410.928.59 710 101-710 35 99+35 30.349.7610.34 2.254.8+77.50.48 4.87.8+780.52 1.311.61.61.3 227(152728)215 4.3612.58 2.5321.2561.25 0.8 9.63.23 15.20.254 89 89 89 89 12.065.072.94 146.5-(23+46.5)12.89-(3.89-1.6)73.8-1.64-13.8-5.36 15.75+3.59-0.59+14.255.48-(9.4-0.52)4 X3 9=29 5X3 4X6=2 0.365-34 X
5、=35 X-0.8 X=16+6 23(X-4.5)=7 X 12 2(X-2.6)=8 25 X-13 X=310 4+0.7X=102 7X(16+38)=1312 X0.375 X=20 X 8.5=1.5 12 X-25%X=10 二、简便运算。(712-15)60 363435 0.65101 35 99+35 (1.25-0.125)8 2538 8 710 101-710 27.53.7-7.53.7 (12+)7 1310.2 2.699 710 101-710 47 613+37 613 0.921.410.928.59 8 2.254.8+77.50.48 4.87.8+780.52 1.311.61.61.3227(152728)215 4.3612.58 2.5321.251.25 0.8 9.63.23 15.20.254 89 89 89 89 3 3 146.5-(23+46.5)12.89-(3.89-1.6)73.8-1.64-13.8-5.36 15.75+3.59-0.59+14.251253625 31/3031 5.48-(9.4-0.52)912.065.072.94 30.349.7610.34