①
②
③7.85×101
④
⑴5a=b( ) ⑵a+b= 10( )
⑶a-b=0( ) ⑷=b( )
⑸4a- 5b=44( ) ⑹2a÷4=b( )
517-209=
326+458=
8.18- 2.06 =
1.29+3.6=
3×214 =
630÷70 =
2.31×4 =
0.36÷0.4=
①12.7×99+12.7
列式: