②1+3+5+7+9
③ 100-57-23
24×5= 150×50= 472-43-57= 16×99+16=
254+27+73= 59×101-59=
①86+49+351
②132-68-32
③143+64+57+136
④12×24-12×14
⑤72×125
⑥4600÷25÷4
⑦76×237+237×24
⑧99×38+38
⑨104×25
⑩43×98
586+(214+537)=(586+)+537
1348+2655+7345+8652=
28+16
=28+2+14
=30+14
=44
=32++
=40+
=
=62++
=70+
=
=++
=+
=
=++
=+
=
①837+64+36
②135+93+145+107
③2×72+72×58
④87×201
⑤457-(78+57)
⑥360÷15÷4
56+147+53=56+( + )
65+▲+■=65+( + )
(△+□)+○=+( + )
( + )+ = +(+ )
①324+79+121+176
②25×28
③63×22+63×178
④(25+8)×4
⑤45×[(37+11)÷2]
⑥320÷8-12×3