Раскройте скобки и упростите выражение:
а. 1/4 (16 − 2,4) + 0,7;
б. 0,3 (6 − 5) − 1,8(2 − 1);
в. −18 (5/9 −1/6 + 5/36) − 4 (1/4 + 3/16 ).
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