29.7-(6.2+0.84)*4 简便运算

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29.7-(6.2+0.84)*4简便运算29.7-(6.2+0.84)*4简便运算29.7-(6.2+0.84)*4简便运算29.7-(6.2+0.84)*4=29.7-7.04*4=29.7-(7

29.7-(6.2+0.84)*4 简便运算
29.7-(6.2+0.84)*4 简便运算

29.7-(6.2+0.84)*4 简便运算
29.7-(6.2+0.84)*4
=29.7-7.04*4
=29.7-(7+0.04)*4
=29.7-7*4-0.04*4
=29.7-28-0.16
=1.7-0.16
=1.54

29.7-4*6.2+4*0.84