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B. fill in the missing number to make each equation correct

1.) 17×___=1×17
2.) 9×5+2) =(9×_____)
3.) 15 +(10 + 8)=(15 +_____+8
4.) 4 x (8 + 3)=(4 ×8+(4×____)
5.) 8 + 7 = 7 +____