(1)计算: 7.926.1-0.5 7.2401解方程: 5 = X 25% X =411283(2)计算:2+ )431(1074)52(解方程:-= 18-3=15853(3)计算:1+0.450.9 - 3.5 +873215解方程: X - 2.58=100 3.5+ = 835 2(4)计算:10.6-( ) (35312.08615)70.21解方程:25%+58=50 25=12(5)计算: 2.1)74()2.053(4.解方程:1.25-=3.2 245=12(6)计算: 167354)()1243(5解方程:8 = 2.4 1.8 X =(7)计算: )2.053(48.2.1)456(解方程:8-1.28= 3 0.875-3= 8(8)计算: 5.4)1(4312解方程:1.52+32%=5 6=1.2(9)计算: 35167354)(解方程:0.8 X 20.7=1.3 - -2= 82(10)计算: )8127(351435解方程:60%-0.9=1.5 6+ =0.81.51