Đáp án + giải thích các bước giải:

`15,2 × 3 + 15,2 × 5 + 15,2 + 15,2`

`=15,2 × 3 + 15,2 × 5 + 15,2xx1+ 15,2xx1`

`=15,2 ×( 3+5+1+1)`

`=15,2 ×10`

`=152`

`--------`

`2,025 × 10 + 0,2025 : 0,01 + 2,025 : 0,1 + 20,25 × 97`

`=2,025 × 10 + 0,2025xx100 + 2,025xx10 + 20,25 × 97`

`=2,025 × 10 + 0,2025xx10xx10 + 2,025xx10 + 20,25xx0,1 × 97`

`=2,025 × 10 + 2,025xx10 + 2,025xx10 + 2,025× 9,7`

`=2,025 ×( 10 + 10 + 10 +  9,7)`

`=2,025 ×( 30 +  9,7)`

`=2,025 ×39,7`

`=80,3925`

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