直接写得数
+= | 1-= | += | -= |
++= | 5÷8= | 9.2×0.25×4= | 0.8×25-10= |
解方程或比例
①X:=18: | ②1.5x+5×0.6=12 | ③x÷40%=4.5. |
求未知数x
(1)3x-1.8=27 | (2)x+x= | (3)4.5(x-2)=1. |
+= | 1-= | += | -= |
++= | 5÷8= | 9.2×0.25×4= | 0.8×25-10= |
①X:=18: | ②1.5x+5×0.6=12 | ③x÷40%=4.5. |
(1)3x-1.8=27 | (2)x+x= | (3)4.5(x-2)=1. |