⑴363-45+55 ⑵(762-698)÷8 ⑶638-9×8 ⑷903-(251+359)
7.3+1.7=
7.51+4.9=
4.7+3.8=
7+3.8=
5.6+3=
5.6+0.4=
8.5-2.9=
2-0.01=
4.2-3.5=
4.8-4=
7.6+2.5=
1.74+3.2=
3.8+4.02=
6.3+2.2=
6.26-3.6=
3.42+0.48=
9.37-6.5=
3.65+1.35=
1.25+0.8=
4.04+3.5=
1.76+2.8=
4.8-4.3=
8.26+7.2=
0.24+5.2=
0.8+0.02=
6.5-3.9=
4.4-3.6=
4.6+3=
4.4-3.9=
0.89+2.73=
86+45=
43-17=
370+130=
284+455=
1980-72÷9=
90-27=
3×8+74=
(436-388)÷8=
490+370=
760-240=
540+310=
840-270=
①4:5=x:25
②1+4x=6.7
③3x﹣60%x=4.32
④:3