Fill in the same number in the brackets to make the equation hold. 0.3 × () × - () 0.25 = 21.15-7 × () 0.3×( )× － ( )0.25＝21.15－7×( )

Fill in the same number in the brackets to make the equation hold. 0.3 × () × - () 0.25 = 21.15-7 × () 0.3×( )× － ( )0.25＝21.15－7×( )

Let the number of brackets be x, then 0.3x-0.25x = 21.15-7x, so 7.05x = 21.75, so x = 3

425.239 million = () fill in the appropriate number in brackets

425239000 = (425239000)
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3 () 7 times () = 2 () 9 () fill in the appropriate number in the brackets

337×8=2696
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