7﹣6.38= 0.42÷0.7= 0.62= 37.2×99+37.2=
7.3﹣3= 8÷0.5= 53= 9﹣(2.5+6.5)=
0.8﹣0.35= 1÷0.25= 0.22×0.5= 10﹣4.8﹣3.2=
+ = - = + = 1- =
- = +2= -0= -1=
- = + - + =
43= 0.25÷2.5= 0.62=
1+3.48= 2.6+4= 0.9-0.45= 99×36=
+ = - = + = + - =
- = + = 1- - = - + =
+ = - = + = 0.5+ = 83=
- = +2= 1- = -0.75= 122=
45×20= 48+52= 0.48÷0.08= 1.25×8×0=
21÷3×7= 1+ = 9- - = + =
9÷9= 1000﹣40= 300+70= 8÷1= 2500+1500=
60+30= 1500﹣600= 0×8= 608+291≈ 908﹣198≈