53. 651 +126 379-253 306-138 402-243 453\(\cdot\)2 321\(\cdot\)3 5\(\cdot\)171 6\(\cdot\)98

Решение:

• $$651 + 126 = 777$$


• $$379 - 253 = 126$$


• $$306 - 138 = 168$$


• $$402 - 243 = 159$$


• $$453 \cdot 2 = 906$$


• $$321 \cdot 3 = 963$$


• $$5 \cdot 171 = 855$$


• $$6 \cdot 98 = 588$$