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There are 500 simple mixed operations in the second volume of Grade Four.
158+262+ 138

375+2 19+38 1+225

500 1-247- 102 1-232

( 18 1+2564)+27 19

378+44+ 1 14+242+222

276+228+353+2 19

(375+ 1034)+(966+ 125)

(2 130+783+270)+ 10 17

99+999+9999+99999

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