4.38÷0.994.38
6.48×0.164.8×0.01 1.2÷0.840.84
1.05÷0.31.05 6.4÷0.56.4×2
9.8÷0.989.8×10 32÷10032×0.1
2.6+4.3= 3.7+3= 2.5+7.5= 1-0.01= 4.8+2.32=
0.25+0.4= 0.37-0.3= 560÷80= 0.24+0.6= 7.52-2.52=
42-22=(4+2)×(4-2)=12
72-32=(7+3)×(7-3)=4092-42=(9+4)×(9-4)=65
152-52=(+)×(-)
①3.86+6.4+2.14+7.6
②5.2÷0.32﹣0.12
③()×15
④
⑤
⑥