giúp mik với

`a, 274 + ( 158 + 26 )`

`= ( 274 + 26 ) + 158`

`= 300 + 158`

`= 458`

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`b, 123 + 132 + 321 + 312`

`= ( 123 + 321 ) + ( 132 + 312 )`

`= 444 + 444`

`= 888`

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`c, 3 * 125 * 121 * 8`

`= ( 3 * 121 ) * ( 125 * 8 )`

`= 363 * 1000`

`= 363000`

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`d, 367 + 129 + 133 + 371 + 17`

`= ( 367 + 133 ) + ( 129 + 371 ) + 17`

`= 500 + 500 + 17`

`= 1000 + 17`

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`e, 29 + 132 + 237 + 868 + 763`

`= 29 + ( 132 + 868 ) + ( 237 + 763 )`

`= 29 + ( 1000 + 1000 )`

`= 29 + 2000`

`= 2029`

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`f, 652 + 327 + 148 + 15 + 73`

`= ( 652 + 148 ) + ( 327 + 73 ) + 15`

`= 800 + 400 + 15`

`= 1200 + 15`

`= 1215`

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`g, 25 * 5 * 4 * 31 * 2`

`= ( 25 * 4 ) * ( 5 * 2 ) * 31`

`= 100 * 10 * 31`

`= 1000 * 31`

`= 31000`

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`h, 37 * 64 + 37 * 36`

`= 37 * ( 64 + 36 )`

`= 37 * 100`

`= 3700`