①8.4+2.8-3.2
②30×(64-21)
- = + = + = - =
+ = - = 1- = - =
200÷2=
41×2=
20×30=
810÷9=
96÷4=
13×200=
27×3≈
152÷5≈
①168+210÷3
②720÷(4×2)
③280÷4-58
④735÷5÷7
5.43+5.57= 125×72= 299÷102≈ 6×÷6×=
5%×56= 33= = =