20-0.2 2.4×5 8.4÷0.7 2.35+6.65
3.07×100 10-0.07 1.01+0.7 1÷0.25
= 1.75= 3.2= =
①
②
③
④
⑤
+0.021
-0.017
+0.019
-0.02
+0.013