2.1+4x=8.5 3x+2x=2.5
2.3×5=
0.3+0.01=
4÷0.5=
6.7-2.3=
2.3÷0.01=
⑴x﹣2.6=8.4
⑵2x+1.2×6=20
⑶5.3x﹣1.3x=12.8
⑷(x﹣0.7)÷0.4=9.5
﹣0.5= +3= ×= 0.8×=
0.23+177%= 2.5×40= 1÷= ×÷×=