50×90= 3.2-0.8= 54+36= 320÷4=
2.3-0.4= 12×60= 36×20= 0.8+3.6=
45×20= 25+37= 4.9-0.7= 120×4=
92-25= 18×40= 56-25= 47+39=
- = - = + = + = - =
①4.6+3.9=
②2.4-1.6=
③0.7+0.9=
④10.8+5.9=
⑤2.8+7.5=
⑥3.2-2.5=
⑦14.5+5.6=
⑧12.5-5.3=
⑨8.7+9.5=
⑩1.2-0.3=
⑪19.2-8.7=
⑫6.5-3.4=