Question

425, помогите, пожалуйста(​

Answer 1

$1. \: \: \: 47 \times 632 + 632 \times 53 = \\ 632 \times (47 + 53) = \\ 632 \times 100 = 63200$

$2. \: \: \: 598 \times 49 - 597 \times 49 = \\ 49 \times (598 - 597) = \\ 49 \times 1 = 49$

$3. \: \: 754 \times 324 - 754 \times 314 = \\ 754 \times (324 - 314) = \\ 754 \times 10 = 7540$

$4. \: \: 37 \times 46 - 18 \times 37 + 37 \times 72 = \\ 37 \times (46 - 18 + 72) = \\ 37 \times 100 = 3700$